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rotation</title> <meta name="description" content="Search results for: pipe rotation"> <meta name="keywords" content="pipe rotation"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler 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id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="pipe rotation"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 907</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: pipe rotation</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">877</span> Improve Heat Pipes Thermal Performance In H-VAC Systems Using CFD Modeling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Ghanami">A. Ghanami</a>, <a href="https://publications.waset.org/abstracts/search?q=M.Heydari"> M.Heydari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Heat pipe is simple heat transfer device which combines the conduction and phase change phenomena to control the heat transfer without any need for external power source. At hot surface of heat pipe, the liquid phase absorbs heat and changes to vapor phase. The vapor phase flows to condenser region and with the loss of heat changes to liquid phase. Due to gravitational force the liquid phase flows to evaporator section. In HVAC systems the working fluid is chosen based on the operating temperature. The heat pipe has significant capability to reduce the humidity in HVAC systems. Each HVAC system which uses heater, humidifier or dryer is a suitable nominate for the utilization of heat pipes. Generally heat pipes have three main sections: condenser, adiabatic region and evaporator. Performance investigation and optimization of heat pipes operation in order to increase their efficiency is crucial. In present article, a parametric study is performed to improve the heat pipe performance. Therefore, the heat capacity of heat pipe with respect to geometrical and confining parameters is investigated. For the better observation of heat pipe operation in HVAC systems, a CFD simulation in Eulerian- Eulerian multiphase approach is also performed. The results show that heat pipe heat transfer capacity is higher for water as working fluid with the operating temperature of 340 K. It is also showed that the vertical orientation of heat pipe enhances it’s heat transfer capacity.used in the abstract. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Heat%20pipe" title="Heat pipe">Heat pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=HVAC%20system" title=" HVAC system"> HVAC system</a>, <a href="https://publications.waset.org/abstracts/search?q=Grooved%20Heat%20pipe" title=" Grooved Heat pipe"> Grooved Heat pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=Heat%20pipe%20limits." title=" Heat pipe limits. "> Heat pipe limits. </a> </p> <a href="https://publications.waset.org/abstracts/23309/improve-heat-pipes-thermal-performance-in-h-vac-systems-using-cfd-modeling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23309.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">482</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">876</span> Interaction of the Circumferential Lamb Wave with Delamination in the Middle of Pipe Wall</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Li%20Ziming">Li Ziming</a>, <a href="https://publications.waset.org/abstracts/search?q=He%20Cunfu"> He Cunfu</a>, <a href="https://publications.waset.org/abstracts/search?q=Liu%20Zenghua"> Liu Zenghua</a> </p> <p class="card-text"><strong>Abstract:</strong></p> With aim for delamination type defects detection in manufacturing process of seamless pipe,this paper studies the interaction of the circumferential lamb wave with delamination in aluminum pipe.The delamination is located in the middle of pipe wall.A numerical study is carried out,the circumferential lamb wave used here is CL0 mode,which is generated with a finite element method code.Wave structures from the simulation are compared with theoretical results to verify the model’s accuracy.Delamination along the circumferential direction is established by demerging nodes of the same coordinates.When CL0 mode is incident at the entrance and exit of a delamination,it generates new mode-CL1,undergoes multiple reverberation and mode conversions between the two ends of the delamination. Signals of different receptions are obtained to provide insight in using CL0 mode for locating the delamination. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=circumferential%20lamb%20wave" title="circumferential lamb wave">circumferential lamb wave</a>, <a href="https://publications.waset.org/abstracts/search?q=delamination" title=" delamination"> delamination</a>, <a href="https://publications.waset.org/abstracts/search?q=FEM" title=" FEM"> FEM</a>, <a href="https://publications.waset.org/abstracts/search?q=seamless%20pipe" title=" seamless pipe"> seamless pipe</a> </p> <a href="https://publications.waset.org/abstracts/33095/interaction-of-the-circumferential-lamb-wave-with-delamination-in-the-middle-of-pipe-wall" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33095.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">312</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">875</span> Bowing of a Pipeline from Longitudinal Compressive Stress Induced by Ground Movement</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gennaro%20Marino">Gennaro Marino</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper concerns a case of a 10.75 inch diameter buried gas transmission line which was exposed to mine subsidence ground movements. The pipeline was buried about 4ft. below the surface with maximum operating pressure of 1440 psi. The mine subsidence movement was the result of long walling ore at a depth of approximately 1600 ft. As ore extraction progressed, the stress in the monitored pipeline worsened and was approaching unacceptable levels. The excessive pipe compression resulted when it was exposed to the compression zone of subsidence basin created by mining. The pipe stress reached a significant compressive level due to the extensive length of the pipe exposed to frictional ground-pipe slip resistance. The backfill ground movement slip resistance depends on normal stress around the pipe, the rate of slip, and the backfill characteristics. Normal stress depends on the burial depth of the backfill density and the lateral subsidence induced stress. The backfill in this site has a soil dry density of approximately 90 PCF. A suite of direct shear tests was conducted a residual friction angle of 36 was determined for the ambient backfill. These tests showed that the residual shearing resistance was reached within a fraction of an inch. The pipe was coated with fusion-bonded epoxy, so friction reduce factory of 0.6 can be considered. To relieve ground movement induced compressive stress, the line was uncovered. As more of the pipeline was exposed, the pipe abruptly bowed in the excavation. An analysis of this pipe formation which was performed is provided in this paper. Also discussed in this paper are ways to mitigate this pipe deformation or upheaval buckling from occurring. Keywords: Pipe Upheaval, Pipe Buckling, Ground subsidence, Buried Pipeline, Pipe Stress Mitigation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pipe%20upheaval" title="pipe upheaval">pipe upheaval</a>, <a href="https://publications.waset.org/abstracts/search?q=pipe%20buckling" title=" pipe buckling"> pipe buckling</a>, <a href="https://publications.waset.org/abstracts/search?q=ground%20subsidence" title=" ground subsidence"> ground subsidence</a>, <a href="https://publications.waset.org/abstracts/search?q=buried%20pipeline" title=" buried pipeline"> buried pipeline</a>, <a href="https://publications.waset.org/abstracts/search?q=pipe%20stress%20mitigation" title=" pipe stress mitigation"> pipe stress mitigation</a> </p> <a href="https://publications.waset.org/abstracts/138456/bowing-of-a-pipeline-from-longitudinal-compressive-stress-induced-by-ground-movement" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/138456.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">161</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">874</span> Analysis of an Error Estimate for the Asymptotic Solution of the Heat Conduction Problem in a Dilated Pipe</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=E.%20Maru%C5%A1i%C4%87-Paloka">E. Marušić-Paloka</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Pa%C5%BEanin"> I. Pažanin</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Pr%C5%A1a"> M. Prša</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Subject of this study is the stationary heat conduction problem through a pipe filled with incompressible viscous fluid. In previous work, we observed the existence and uniqueness theorems for the corresponding boundary-value problem and within we have taken into account the effects of the pipe's dilatation due to the temperature of the fluid inside of the pipe. The main difficulty comes from the fact that flow domain changes depending on the solution of the observed heat equation leading to a non-standard coupled governing problem. The goal of this work is to find solution estimate since the exact solution of the studied problem is not possible to determine. We use an asymptotic expansion in order of a small parameter which is presented as a heat expansion coefficient of the pipe's material. Furthermore, an error estimate is provided for the mentioned asymptotic approximation of the solution for inner area of the pipe. Close to the boundary, problem becomes more complex so different approaches are observed, mainly Theory of Perturbations and Separations of Variables. In view of that, error estimate for the whole approximation will be provided with additional software simulations of gotten situation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=asymptotic%20analysis" title="asymptotic analysis">asymptotic analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=dilated%20pipe" title=" dilated pipe"> dilated pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=error%20estimate" title=" error estimate"> error estimate</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20conduction" title=" heat conduction"> heat conduction</a> </p> <a href="https://publications.waset.org/abstracts/77208/analysis-of-an-error-estimate-for-the-asymptotic-solution-of-the-heat-conduction-problem-in-a-dilated-pipe" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/77208.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">235</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">873</span> Experimental Stress Analysis on Pipeline in Condition of Frost Heave and Thaw Settlement</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zhiqiang%20Cheng">Zhiqiang Cheng</a>, <a href="https://publications.waset.org/abstracts/search?q=Qingliang%20He"> Qingliang He</a>, <a href="https://publications.waset.org/abstracts/search?q=Lu%20Li"> Lu Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Jie%20Ren"> Jie Ren</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The safety of pipelines in the condition of frost heave or thaw settlement is necessarily evaluated. A full-scale experiment pipe with the typical structure configuration in station pipeline is constructed, the residual stress is tested with X-ray residual stress device, and the residual stress field of pipe is analyzed. The evolution of pipe strain with pressure in the scope of maximum allowable operation pressure (MAOP) is investigated by both strain gauge and X-ray methods. Load caused by frost heave or thaw settlement is simulated by two ways of lifting jack. The relation of maximum stress of pipe and clearances between supporter and pipe is studied in case of frost heave. The relation of maximum stress of pipe and maximum deformation of pipe on the ground is studied in case of thaw settlement. The study methods and results are valuable for safety assessment of station pipeline according to clearances or deformation in the condition of frost heave or thaw settlement. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=frost%20heave" title="frost heave">frost heave</a>, <a href="https://publications.waset.org/abstracts/search?q=pipeline" title=" pipeline"> pipeline</a>, <a href="https://publications.waset.org/abstracts/search?q=stress%20analysis" title=" stress analysis"> stress analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=thaw%20settlement" title=" thaw settlement"> thaw settlement</a> </p> <a href="https://publications.waset.org/abstracts/101888/experimental-stress-analysis-on-pipeline-in-condition-of-frost-heave-and-thaw-settlement" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/101888.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">186</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">872</span> Periodic Change in the Earth’s Rotation Velocity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sung%20Duk%20Kim">Sung Duk Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Kwan%20U.%20Kim"> Kwan U. Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Jin%20Sim"> Jin Sim</a>, <a href="https://publications.waset.org/abstracts/search?q=Ryong%20Jin%20Jang"> Ryong Jin Jang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The phenomenon of seasonal variations in the Earth’s rotation velocity was discovered in the 1930s when a crystal clock was developed and analyzed in a quantitative way for the first time between 1955 and 1968 when observation data of the seasonal variations was analyzed by an atomic clock. According to the previous investigation, atmospheric circulation is supposed to be a factor affecting the seasonal variations in the Earth’s rotation velocity in many cases, but the problem has not been solved yet. In order to solve the problem, it is necessary to apply dynamics to consider the Earth’s spatial motion, rotation, and change of shape of the Earth (movement of materials in and out of the Earth and change of the Earth’s figure) at the same time and in interrelation to the accuracy of post-Newtonian approximation regarding the Earth body as a system of mass points because the stability of the Earth’s rotation angular velocity is in the range of 10⁻⁸~10⁻⁹. For it, the equation was derived, which can consider the 3 kinds of motion above mentioned at the same time by taking the effect of the resultant external force on the Earth’s rotation into account in a relativistic way to the accuracy of post-Newtonian approximation. Therefore, the equation has been solved to obtain the theoretical values of periodic change in the Earth’s rotation velocity, and they have been compared with the astronomical observation data so to reveal the cause for the periodic change in the Earth’s rotation velocity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Earth%20rotation" title="Earth rotation">Earth rotation</a>, <a href="https://publications.waset.org/abstracts/search?q=moment%20function" title=" moment function"> moment function</a>, <a href="https://publications.waset.org/abstracts/search?q=periodic%20change" title=" periodic change"> periodic change</a>, <a href="https://publications.waset.org/abstracts/search?q=seasonal%20variation" title=" seasonal variation"> seasonal variation</a>, <a href="https://publications.waset.org/abstracts/search?q=relativistic%20change" title=" relativistic change"> relativistic change</a> </p> <a href="https://publications.waset.org/abstracts/182897/periodic-change-in-the-earths-rotation-velocity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182897.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">73</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">871</span> Analyzing the Effect of Design of Pipe in Shell and Tube Type Heat Exchanger by Measuring Its Heat Transfer Rate by Computation Fluid Dynamics and Thermal Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dhawal%20Ladani">Dhawal Ladani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Shell and tube type heat exchangers are predominantly used in heat exchange between two fluids and other applications. This paper projects the optimal design of the pipe used in the heat exchanger in such a way to minimize the vibration occurring in the pipe. Paper also consists of the comparison of the different design of the pipe to get the maximize the heat transfer rate by converting laminar flow into the turbulent flow. By the updated design the vibration in the pipe due to the flow is also decreased. Computational Fluid Dynamics and Thermal Heat Transfer analysis are done to justifying the result. Currently, the straight pipe is used in the shell and tube type of heat exchanger where as per the paper the pipe consists of the curvature along with the pipe. Hence, the heat transfer area is also increased and result in the increasing in heat transfer rate. Curvature type design is useful to create turbulence and minimizing the vibration, also. The result will give the output comparison of the effect of laminar flow and the turbulent flow in the heat exchange mechanism, as well as, inverse effect of the boundary layer in heat exchanger is also justified. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20exchanger" title="heat exchanger">heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer%20rate" title=" heat transfer rate"> heat transfer rate</a>, <a href="https://publications.waset.org/abstracts/search?q=laminar%20and%20turbulent%20effect" title=" laminar and turbulent effect"> laminar and turbulent effect</a>, <a href="https://publications.waset.org/abstracts/search?q=shell%20and%20tube" title=" shell and tube"> shell and tube</a> </p> <a href="https://publications.waset.org/abstracts/76104/analyzing-the-effect-of-design-of-pipe-in-shell-and-tube-type-heat-exchanger-by-measuring-its-heat-transfer-rate-by-computation-fluid-dynamics-and-thermal-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76104.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">307</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">870</span> New Moment Rotation Model of Single Web Angle Connections</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zhengyi%20Kong">Zhengyi Kong</a>, <a href="https://publications.waset.org/abstracts/search?q=Seung-Eock%20Kim"> Seung-Eock Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Single angle connections, which are bolted to the beam web and the column flange, are studied to investigate moment-rotation behavior. Elastic–perfectly plastic material behavior is assumed. ABAQUS software is used to analyze the nonlinear behavior of a single angle connection. The same geometric and material conditions with Yanglin Gong’s test are used for verifying finite element models. Since Kishi and Chen’s Power model and Lee and Moon’s Log model are accurate only for a limited range, simpler and more accurate hyperbolic function models are proposed. The equation for calculating rotation at ultimate moment is first proposed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20method" title="finite element method">finite element method</a>, <a href="https://publications.waset.org/abstracts/search?q=moment%20and%20rotation" title=" moment and rotation"> moment and rotation</a>, <a href="https://publications.waset.org/abstracts/search?q=rotation%20at%20ultimate%20moment" title=" rotation at ultimate moment"> rotation at ultimate moment</a>, <a href="https://publications.waset.org/abstracts/search?q=single-web%20angle%20connections" title=" single-web angle connections "> single-web angle connections </a> </p> <a href="https://publications.waset.org/abstracts/24311/new-moment-rotation-model-of-single-web-angle-connections" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24311.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">431</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">869</span> Optimization of Copper-Water Negative Inclination Heat Pipe with Internal Composite Wick Structure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=I.%20Brandys">I. Brandys</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Levy"> M. Levy</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Harush"> K. Harush</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Haim"> Y. Haim</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Korngold"> M. Korngold</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Theoretical optimization of a copper-water negative inclination heat pipe with internal composite wick structure has been performed, regarding a new introduced parameter: the ratio between the coarse mesh wraps and the fine mesh wraps of the composite wick. Since in many cases, the design of a heat pipe matches specific thermal requirements and physical limitations, this work demonstrates the optimization of a 1 m length, 8 mm internal diameter heat pipe without an adiabatic section, at a negative inclination angle of -10º. The optimization is based on a new introduced parameter, LR: the ratio between the coarse mesh wraps and the fine mesh wraps. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20pipe" title="heat pipe">heat pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=inclination" title=" inclination"> inclination</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=ratio" title=" ratio"> ratio</a> </p> <a href="https://publications.waset.org/abstracts/12959/optimization-of-copper-water-negative-inclination-heat-pipe-with-internal-composite-wick-structure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12959.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">328</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">868</span> Innovative Pump Design Using the Concept of Viscous Fluid Sinusoidal Excitation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20H.%20Elkholy">Ahmed H. Elkholy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The concept of applying a prescribed oscillation to viscous fluids to aid or increase flow is used to produce a maintenance free pump. Application of this technique to fluids presents unique problems such as physical separation; control of heat and mass transfer in certain industrial applications; and improvement of some fluid process methods. The problem as stated is to obtain the velocity distribution, wall shear stress and energy expended when a pipe containing a stagnant viscous fluid is externally excited by a sinusoidal pulse, one end of the pipe being pinned. On the other hand, the effect of different parameters on the results are presented. Such parameters include fluid viscosity, frequency of oscillations and pipe geometry. It was found that the flow velocity through the pump is maximum at the pipe wall, and it decreases rapidly towards the pipe centerline. The frequency of oscillation should be above a certain value in order to obtain meaningful flow velocity. The amount of energy absorbed in the system is mainly due to pipe wall strain energy, while the fluid pressure and kinetic energies are comparatively small. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sinusoidal%20excitation" title="sinusoidal excitation">sinusoidal excitation</a>, <a href="https://publications.waset.org/abstracts/search?q=pump" title=" pump"> pump</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20stress" title=" shear stress"> shear stress</a>, <a href="https://publications.waset.org/abstracts/search?q=flow" title=" flow"> flow</a> </p> <a href="https://publications.waset.org/abstracts/48529/innovative-pump-design-using-the-concept-of-viscous-fluid-sinusoidal-excitation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48529.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">315</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">867</span> Effect of Rotation Rate on Chemical Segregation during Phase Change</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nouri%20Sabrina">Nouri Sabrina</a>, <a href="https://publications.waset.org/abstracts/search?q=Benzeghiba%20Mohamed"> Benzeghiba Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Ghezal%20Abderrahmane"> Ghezal Abderrahmane</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Numerical parametric study is conducted to study the effects of ampoule rotation on the flows and the dopant segregation in vertical Bridgman (VB) crystal growth. Calculations were performed in unsteady state. The extended Darcy model, which includes the time derivative and Coriolis terms, has been employed in the momentum equation. It was found that the convection, and dopant segregation can be affected significantly by ampoule rotation, and the effect is similar to that by an axial magnetic field. Ampoule rotation decreases the intensity of convection and stretches the flow cell axially. When the convection is weak, the flow can be suppressed almost completely by moderate ampoule rotation and the dopant segregation becomes diffusion-controlled. For stronger convection, the elongated flow cell by ampoule rotation may bring dopant mixing into the bulk melt reducing axial segregation at the early stage of the growth. However, if the cellular flow cannot be suppressed completely, ampoule rotation may induce larger radial segregation due to poor mixing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=numerical%20simulation" title="numerical simulation">numerical simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20and%20mass%20transfer" title=" heat and mass transfer"> heat and mass transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=vertical%20solidification" title=" vertical solidification"> vertical solidification</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20segregation" title=" chemical segregation"> chemical segregation</a> </p> <a href="https://publications.waset.org/abstracts/2098/effect-of-rotation-rate-on-chemical-segregation-during-phase-change" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2098.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">348</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">866</span> The Proposal of Modification of California Pipe Method for Inclined Pipe </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wojciech%20D%C4%85browski">Wojciech Dąbrowski</a>, <a href="https://publications.waset.org/abstracts/search?q=Joanna%20B%C4%85k"> Joanna Bąk</a>, <a href="https://publications.waset.org/abstracts/search?q=Laurent%20Solliec"> Laurent Solliec</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nowadays technical and technological progress and constant development of methods and devices applied to sanitary engineering is indispensable. Issues related to sanitary engineering involve flow measurements for water and wastewater. The precise measurement is very important and pivotal for further actions, like monitoring. There are many methods and techniques of flow measurement in the area of sanitary engineering. Weirs and flumes are well–known methods and common used. But also there are alternative methods. Some of them are very simple methods, others are solutions using high technique. The old–time method combined with new technique could be more useful than earlier. Paper describes substitute method of flow gauging (California pipe method) and proposal of modification of this method used for inclined pipe. Examination of possibility of improving and developing old–time methods is direction of the investigation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=California%20pipe" title="California pipe">California pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=sewerage" title=" sewerage"> sewerage</a>, <a href="https://publications.waset.org/abstracts/search?q=flow%20rate%20measurement" title=" flow rate measurement"> flow rate measurement</a>, <a href="https://publications.waset.org/abstracts/search?q=water" title=" water"> water</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater" title=" wastewater"> wastewater</a>, <a href="https://publications.waset.org/abstracts/search?q=improve" title=" improve"> improve</a>, <a href="https://publications.waset.org/abstracts/search?q=modification" title=" modification"> modification</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20monitoring" title=" hydraulic monitoring"> hydraulic monitoring</a>, <a href="https://publications.waset.org/abstracts/search?q=stream" title=" stream "> stream </a> </p> <a href="https://publications.waset.org/abstracts/13243/the-proposal-of-modification-of-california-pipe-method-for-inclined-pipe" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13243.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">438</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">865</span> Development of Orbital TIG Welding Robot System for the Pipe</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dongho%20Kim">Dongho Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Sung%20Choi"> Sung Choi</a>, <a href="https://publications.waset.org/abstracts/search?q=Kyowoong%20Pee"> Kyowoong Pee</a>, <a href="https://publications.waset.org/abstracts/search?q=Youngsik%20Cho"> Youngsik Cho</a>, <a href="https://publications.waset.org/abstracts/search?q=Seungwoo%20Jeong"> Seungwoo Jeong</a>, <a href="https://publications.waset.org/abstracts/search?q=Soo-Ho%20Kim"> Soo-Ho Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study is about the orbital TIG welding robot system which travels on the guide rail installed on the pipe, and welds and tracks the pipe seam using the LVS (Laser Vision Sensor) joint profile data. The orbital welding robot system consists of the robot, welder, controller, and LVS. Moreover we can define the relationship between welding travel speed and wire feed speed, and we can make the linear equation using the maximum and minimum amount of weld metal. Using the linear equation we can determine the welding travel speed and the wire feed speed accurately corresponding to the area of weld captured by LVS. We applied this orbital TIG welding robot system to the stainless steel or duplex pipe on DSME (Daewoo Shipbuilding and Marine Engineering Co. Ltd.,) shipyard and the result of radiographic test is almost perfect. (Defect rate: 0.033%). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adaptive%20welding" title="adaptive welding">adaptive welding</a>, <a href="https://publications.waset.org/abstracts/search?q=automatic%20welding" title=" automatic welding"> automatic welding</a>, <a href="https://publications.waset.org/abstracts/search?q=pipe%20welding" title=" pipe welding"> pipe welding</a>, <a href="https://publications.waset.org/abstracts/search?q=orbital%20welding" title=" orbital welding"> orbital welding</a>, <a href="https://publications.waset.org/abstracts/search?q=laser%20vision%20sensor" title=" laser vision sensor"> laser vision sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=LVS" title=" LVS"> LVS</a>, <a href="https://publications.waset.org/abstracts/search?q=welding%20D%2FB" title=" welding D/B "> welding D/B </a> </p> <a href="https://publications.waset.org/abstracts/1631/development-of-orbital-tig-welding-robot-system-for-the-pipe" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1631.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">688</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">864</span> Simulation of Ester Based Mud Performance through Drilling Genting Timur Field</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lina%20Ismail%20Jassim">Lina Ismail Jassim</a>, <a href="https://publications.waset.org/abstracts/search?q=Robiah%20Yunus"> Robiah Yunus</a> </p> <p class="card-text"><strong>Abstract:</strong></p> To successfully drill oil or gas well, two main characteristics of numerous other tasks of an efficient drilling fluid are required, which are suspended and carrying cuttings from the beneath wellbore to the surface and managed between pore (formation) and hydrostatic pressure (mud pressure). Several factors like mud composition and its rheology, wellbore design, drilled cuttings characteristics and drilling string rotation contribute to drill wellbore successfully. Simulation model can support an appropriate indication on the drilling fluid performance in the real field as Genting Timur field, located in Pahang in Malaysia on 4295 m depth, held the world record in Sempah Muda 1 (Vertical). A detailed 3 dimensional CFD analysis of vertical, concentric annular two phase flow was developed to study and asses Herschel Bulkley drilling fluid. The effect of Hematite, Barite and calcium carbonates types and size of cutting rock particles on such flow is analyzed. The vertical flows are also associated with a good amount of temperature variation along the depth. This causes a good amount of change in viscosity of the fluid, which is non-Newtonian in nature. Good understanding of the nature of such flows is imperative in developing and maintaining successful vertical well systems. A detailed analysis of flow characteristics due to the drill pipe rotation is done in this work. The inner cylinder of the annulus gets different rotational speed, depending upon the operating conditions. This speed induces a good swirl on the particles and primary fluids which interpret in Ester based drilling fluid cleaning well ability, which in turn determines energy loss along the pipe. Energy loss is assessed in this work in terms of wall shear stress and pressure drop along the pipe. The flow is under an adverse pressure gradient condition, which causes chance of reversed flow and transfers the rock cuttings to the surface. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=concentric%20annulus" title="concentric annulus">concentric annulus</a>, <a href="https://publications.waset.org/abstracts/search?q=non-Newtonian" title=" non-Newtonian"> non-Newtonian</a>, <a href="https://publications.waset.org/abstracts/search?q=two%20phase" title=" two phase"> two phase</a>, <a href="https://publications.waset.org/abstracts/search?q=Herschel%20Bulkley" title=" Herschel Bulkley "> Herschel Bulkley </a> </p> <a href="https://publications.waset.org/abstracts/21642/simulation-of-ester-based-mud-performance-through-drilling-genting-timur-field" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21642.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">308</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">863</span> A Study on Manufacturing of Head-Part of Pipes Using a Rotating Manufacturing Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20H.%20Park">J. H. Park</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20K.%20Lee"> S. K. Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20W.%20Kim"> Y. W. Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20C.%20Ko"> D. C. Ko</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A large variety of pipe flange is required in marine and construction industry.Pipe flanges are usually welded or screwed to the pipe end and are connected with bolts.This approach is very simple and widely used for a long time, however, it results in high development cost and low productivity, and the productions made by this approach usually have safety problem at the welding area.In this research, a new approach of forming pipe flange based on cold forging and floating die concept is presented.This innovative approach increases the effectiveness of the material usage and save the time cost compared with conventional welding method. To ensure the dimensional accuracy of the final product, the finite element analysis (FEA) was carried out to simulate the process of cold forging, and the orthogonal experiment methods were used to investigate the influence of four manufacturing factors (pin die angle, pipe flange angle, rpm, pin die distance from clamp jig) and predicted the best combination of them. The manufacturing factors were obtained by numerical and experimental studies and it shows that the approach is very useful and effective for the forming of pipe flange, and can be widely used later. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cold%20forging" title="cold forging">cold forging</a>, <a href="https://publications.waset.org/abstracts/search?q=FEA%20%28finite%20element%20analysis%29" title=" FEA (finite element analysis)"> FEA (finite element analysis)</a>, <a href="https://publications.waset.org/abstracts/search?q=forge-3D" title=" forge-3D"> forge-3D</a>, <a href="https://publications.waset.org/abstracts/search?q=rotating%20forming" title=" rotating forming"> rotating forming</a>, <a href="https://publications.waset.org/abstracts/search?q=tubes" title=" tubes"> tubes</a> </p> <a href="https://publications.waset.org/abstracts/40235/a-study-on-manufacturing-of-head-part-of-pipes-using-a-rotating-manufacturing-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40235.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">377</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">862</span> Elastoplastic Collapse Analysis of Pipe Bends Using Finite Element Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tawanda%20Mushiri">Tawanda Mushiri</a>, <a href="https://publications.waset.org/abstracts/search?q=Charles%20Mbohwa"> Charles Mbohwa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> When an external load is applied to one of its ends, a pipe’s bends cross section tends to deform significantly both in and out of its end plane. This shell type behaviour characteristic of pipe bends and mainly due to their curves geometry accounts for their greater flexibility. This added flexibility is also accompanied by stressed and strains that are much higher than those present in a straight pipe. The primary goal of this research is to study the elastic-plastic behaviour of pipe bends under out of plane moment loading. It is also required to study the effects of changing the value of the pipe bend factor and the value of the internal pressure on that behaviour and to determine the value of the limit moments in each case. The results of these analyses are presented in the form of load deflection plots for each load case belonging to each model. From the load deflection curves, the limit moments of each case are obtained. The limit loads are then compared to those computed using some of the analytical and empirical equation available in the literature. The effects of modelling parameters are also studied. The results obtained from small displacement and large displacement analyses are compared and the effects of using a strain hardened material model are also investigated. To better understand the behaviour of pipe elbows under out of plane bending and internal pressure, it was deemed important to know how the cross section deforms and to study the distribution of stresses that cause it to deform in a particular manner. An elbow with pipe bend factor h=0.1 to h=1 is considered and the results of the detailed analysis are thereof examined. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=elasto-plastic" title="elasto-plastic">elasto-plastic</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20analysis" title=" finite element analysis"> finite element analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=pipe%20bends" title=" pipe bends"> pipe bends</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a> </p> <a href="https://publications.waset.org/abstracts/12999/elastoplastic-collapse-analysis-of-pipe-bends-using-finite-element-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12999.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">325</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">861</span> Coupling Time-Domain Analysis for Dynamic Positioning during S-Lay Installation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sun%20Li-Ping">Sun Li-Ping</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhu%20Jian-Xun"> Zhu Jian-Xun</a>, <a href="https://publications.waset.org/abstracts/search?q=Liu%20Sheng-Nan"> Liu Sheng-Nan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In order to study the performance of dynamic positioning system during S-lay operations, dynamic positioning system is simulated with the hull-stinger-pipe coupling effect. The roller of stinger is simulated by the generalized elastic contact theory. The stinger is composed of Morrison members. Force on pipe is calculated by lumped mass method. Time domain of fully coupled barge model is analyzed combining with PID controller, Kalman filter and allocation of thrust using Sequential Quadratic Programming method. It is also analyzed that the effect of hull wave frequency motion on pipe-stinger coupling force and dynamic positioning system. Besides, it is studied that how S-lay operations affect the dynamic positioning accuracy. The simulation results are proved to be available by checking pipe stress with API criterion. The effect of heave and yaw motion cannot be ignored on hull-stinger-pipe coupling force and dynamic positioning system. It is important to decrease the barge’s pitch motion and lay pipe in head sea in order to improve safety of the S-lay installation and dynamic positioning. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=S-lay%20operation" title="S-lay operation">S-lay operation</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20positioning" title=" dynamic positioning"> dynamic positioning</a>, <a href="https://publications.waset.org/abstracts/search?q=coupling%20motion" title=" coupling motion"> coupling motion</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20domain" title=" time domain"> time domain</a>, <a href="https://publications.waset.org/abstracts/search?q=allocation%20of%20thrust" title=" allocation of thrust "> allocation of thrust </a> </p> <a href="https://publications.waset.org/abstracts/8016/coupling-time-domain-analysis-for-dynamic-positioning-during-s-lay-installation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8016.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">465</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">860</span> MHD Boundary Layer Flow of a Nanofluid Past a Wedge Shaped Wick in Heat Pipe</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ziya%20Uddin">Ziya Uddin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper deals with the theoretical and numerical investigation of magneto-hydrodynamic boundary layer flow of a nano fluid past a wedge shaped wick in heat pipe used for the cooling of electronic components and different type of machines. To incorporate the effect of nanoparticle diameter, concentration of nanoparticles in the pure fluid, nano thermal layer formed around the nanoparticle and Brownian motion of nano particles etc., appropriate models are used for the effective thermal and physical properties of nano fluids. To model the rotation of nano particles inside the base fluid, microfluidics theory is used. In this investigation ethylene glycol (EG) based nanofluids, are taken into account. The non-linear equations governing the flow and heat transfer are solved by using a very effective particle swarm optimization technique along with Runge-Kutta method. The values of heat transfer coefficient are found for different parameters involved in the formulation viz. nanoparticle concentration, nanoparticle size, magnetic field and wedge angle etc. It is found that the wedge angle, presence of magnetic field, nanoparticle size and nanoparticle concentration etc. have prominent effects on fluid flow and heat transfer characteristics for the considered configuration. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanofluids" title="nanofluids">nanofluids</a>, <a href="https://publications.waset.org/abstracts/search?q=wedge%20shaped%20wick" title=" wedge shaped wick"> wedge shaped wick</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20pipe" title=" heat pipe"> heat pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20modeling" title=" numerical modeling"> numerical modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=particle%20swarm%20optimization" title=" particle swarm optimization"> particle swarm optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofluid%20applications" title=" nanofluid applications"> nanofluid applications</a>, <a href="https://publications.waset.org/abstracts/search?q=Heat%20transfer" title=" Heat transfer"> Heat transfer</a> </p> <a href="https://publications.waset.org/abstracts/28316/mhd-boundary-layer-flow-of-a-nanofluid-past-a-wedge-shaped-wick-in-heat-pipe" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28316.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">390</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">859</span> Numerical Analysis of the Effect of Geocell Reinforcement above Buried Pipes on Surface Settlement and Vertical Pressure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Waqed%20H.%20Almohammed">Waqed H. Almohammed</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20Y.%20Fattah"> Mohammed Y. Fattah</a>, <a href="https://publications.waset.org/abstracts/search?q=Sajjad%20E.%20Rasheed"> Sajjad E. Rasheed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dynamic traffic loads cause deformation of underground pipes, resulting in vehicle discomfort. This makes it necessary to reinforce the layers of soil above underground pipes. In this study, the subbase layer was reinforced. Finite element software (PLAXIS 3D) was used to in the simulation, which includes geocell reinforcement, vehicle loading, soil layers and Glass Fiber Reinforced Plastic (GRP) pipe. Geocell reinforcement was modeled using a geogrid element, which was defined as a slender structure element that has the ability to withstand axial stresses but not to resist bending. Geogrids cannot withstand compression but they can withstand tensile forces. Comparisons have been made between the numerical models and experimental works, and a good agreement was obtained. Using the mathematical model, the performance of three different pipes of diameter 600 mm, 800 mm, and 1000 mm, and three different vehicular speeds of 20 km/h, 40 km/h, and 60 km/h, was examined to determine their impact on surface settlement and vertical pressure at the pipe crown for two cases: with and without geocell reinforcement. The results showed that, for a pipe diameter of 600 mm under geocell reinforcement, surface settlement decreases by 94 % when the speed of the vehicle is 20 km/h and by 98% when the speed of the vehicle is 60 km/h. Vertical pressure decreases by 81 % when the diameter of the pipe is 600 mm, while the value decreases to 58 % for a pipe with diameter 1000 mm. The results show that geocell reinforcement causes a significant and positive reduction in surface settlement and vertical stress above the pipe crown, leading to an increase in pipe safety. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dynamic%20loading" title="dynamic loading">dynamic loading</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element" title=" finite element"> finite element</a>, <a href="https://publications.waset.org/abstracts/search?q=geocell-reinforcement" title=" geocell-reinforcement"> geocell-reinforcement</a>, <a href="https://publications.waset.org/abstracts/search?q=GRP%20pipe" title=" GRP pipe"> GRP pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=PLAXIS%203D" title=" PLAXIS 3D"> PLAXIS 3D</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20settlement" title=" surface settlement"> surface settlement</a> </p> <a href="https://publications.waset.org/abstracts/79777/numerical-analysis-of-the-effect-of-geocell-reinforcement-above-buried-pipes-on-surface-settlement-and-vertical-pressure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/79777.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">248</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">858</span> Entropy Generation Analysis of Cylindrical Heat Pipe Using Nanofluid</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Morteza%20Ghanbarpour">Morteza Ghanbarpour</a>, <a href="https://publications.waset.org/abstracts/search?q=Rahmatollah%20Khodabandeh"> Rahmatollah Khodabandeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, second law of thermodynamic is employed to evaluate heat pipe thermal performance. In fact, nanofluids potential to decrease the entropy generation of cylindrical heat pipes are studied and the results are compared with experimental data. Some cylindrical copper heat pipes of 200 mm length and 6.35 mm outer diameter were fabricated and tested with distilled water and water based Al2O3 nanofluids with volume concentrations of 1-5% as working fluids. Nanofluids are nanotechnology-based colloidal suspensions fabricated by suspending nanoparticles in a base liquid. These fluids have shown potential to enhance heat transfer properties of the base liquids used in heat transfer application. When the working fluid undergoes between different states in heat pipe cycle the entropy is generated. Different sources of irreversibility in heat pipe thermodynamic cycle are investigated and nanofluid effect on each of these sources is studied. Both experimental and theoretical studies reveal that nanofluid is a good choice to minimize the entropy generation in heat pipe thermodynamic cycle which results in higher thermal performance and efficiency of the system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20pipe" title="heat pipe">heat pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofluid" title=" nanofluid"> nanofluid</a>, <a href="https://publications.waset.org/abstracts/search?q=thermodynamics" title=" thermodynamics"> thermodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=entropy%20generation" title=" entropy generation"> entropy generation</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20resistance" title=" thermal resistance"> thermal resistance</a> </p> <a href="https://publications.waset.org/abstracts/8659/entropy-generation-analysis-of-cylindrical-heat-pipe-using-nanofluid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8659.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">469</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">857</span> Droplet Entrainment and Deposition in Horizontal Stratified Two-Phase Flow</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Joshua%20Kim%20Schimpf">Joshua Kim Schimpf</a>, <a href="https://publications.waset.org/abstracts/search?q=Kyun%20Doo%20Kim"> Kyun Doo Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Jaseok%20Heo"> Jaseok Heo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the droplet behavior of under horizontal stratified flow regime for air and water flow in horizontal pipe experiments from a 0.24 m, 0.095 m, and 0.0486 m size diameter pipe are examined. The effects of gravity, pipe diameter, and turbulent diffusion on droplet deposition are considered. Models for droplet entrainment and deposition are proposed that considers developing length. Validation for experimental data dedicated from the REGARD, CEA and Williams, University of Illinois, experiment were performed using SPACE (Safety and Performance Analysis Code for Nuclear Power Plants). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=droplet" title="droplet">droplet</a>, <a href="https://publications.waset.org/abstracts/search?q=entrainment" title=" entrainment"> entrainment</a>, <a href="https://publications.waset.org/abstracts/search?q=deposition" title=" deposition"> deposition</a>, <a href="https://publications.waset.org/abstracts/search?q=horizontal" title=" horizontal"> horizontal</a> </p> <a href="https://publications.waset.org/abstracts/66543/droplet-entrainment-and-deposition-in-horizontal-stratified-two-phase-flow" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66543.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">377</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">856</span> Numerical Simulation of the Rotating Vertical Bridgman Growth</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nouri%20Sabrina">Nouri Sabrina</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Numerical parametric study is conducted to study the effects of ampoule rotation on the flows and the dopant segregation in Vertical Bridgman (VB) crystal growth. Calculations were performed in unsteady state. The extended darcy model, whıch includes the time derivative and coriolis terms, has been employed in the momentum equation. It is found that the convection, and dopant segregation can be affected significantly by ampoule rotation, and the effect is similar to that by an axial magnetıc field. Ampoule rotation decreases the intensity of convection and stretches the flow cell axıally. When the convectıon is weak, the flow can be suppressed almost completely by moderate ampoule rotation and the dopant segregation becomes diffusion-controlled. For stronger convection, the elongated flow cell by ampoule rotation may bring dopant mixing into the bulk melt reducing axial segregation at the early stage of the growth. However, if the cellular flow cannot be suppressed completely, ampoule rotation may induce larger radial segregation due to poor mixing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rotating%20vertical%20solidification" title="rotating vertical solidification">rotating vertical solidification</a>, <a href="https://publications.waset.org/abstracts/search?q=Finite%20Volume%20Method" title=" Finite Volume Method"> Finite Volume Method</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20and%20mass%20transfer" title=" heat and mass transfer"> heat and mass transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=porous%20medium" title=" porous medium"> porous medium</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20change" title=" phase change"> phase change</a> </p> <a href="https://publications.waset.org/abstracts/18021/numerical-simulation-of-the-rotating-vertical-bridgman-growth" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18021.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">431</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">855</span> Calculating of the Heat Exchange in a Rotating Pipe: Application to the Cooling of Turbine Blades</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Miloud">A. Miloud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, the results of numerical simulations of the turbulent flow with 3D heat transfer are presented for the case of two U-shaped channels and rotating rectangular section. The purpose of this investigation was to study the effect of the corrugated walls of the heated portion on the improved cooling, in particular the influence of the wavelength. The calculations were performed for a Reynolds number ranging from 10 000 to 100 000, two values of the number of rotation (Ro = 0.0 to 0.14) and a ratio of the restricted density to 0.13. In these simulations, ANSYS FLUENT code was used to solve the Reynolds equations expressing relations between different fields averaged variables over time. Model performance k-omega SST model and RSM are evaluated through a comparison of the numerical results for each model and the experimental and numerical data available. In this work, detailed average temperature predictions, the scope of the secondary flow and distributions of local Nusselt are presented. It turns out that the corrugated configuration further urges the heat exchange provided to reduce the velocity of the coolant inside the channel. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cooling%20blades" title="cooling blades">cooling blades</a>, <a href="https://publications.waset.org/abstracts/search?q=corrugated%20walls" title=" corrugated walls"> corrugated walls</a>, <a href="https://publications.waset.org/abstracts/search?q=model%20k-omega%20SST%20and%20RSM" title=" model k-omega SST and RSM"> model k-omega SST and RSM</a>, <a href="https://publications.waset.org/abstracts/search?q=fluent%20code" title=" fluent code"> fluent code</a>, <a href="https://publications.waset.org/abstracts/search?q=rotation%20effect" title=" rotation effect"> rotation effect</a> </p> <a href="https://publications.waset.org/abstracts/45617/calculating-of-the-heat-exchange-in-a-rotating-pipe-application-to-the-cooling-of-turbine-blades" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45617.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">251</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">854</span> Failure Detection in an Edge Cracked Tapered Pipe Conveying Fluid Using Finite Element Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Gaith">Mohamed Gaith</a>, <a href="https://publications.waset.org/abstracts/search?q=Zaid%20Haddadin"> Zaid Haddadin</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdulah%20Wahbe"> Abdulah Wahbe</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Hamam"> Mahmoud Hamam</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Qunees"> Mahmoud Qunees</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Al%20Khatib"> Mohammad Al Khatib</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Bsaileh"> Mohammad Bsaileh</a>, <a href="https://publications.waset.org/abstracts/search?q=Abd%20Al-Aziz%20Jaber"> Abd Al-Aziz Jaber</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Aqra%E2%80%99a"> Ahmad Aqra’a</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The crack is one of the most common types of failure in pipelines that convey fluid, and early detection of the crack may assist to avoid the piping system from experiencing catastrophic damage, which would otherwise be fatal. The influence of flow velocity and the presence of a crack on the performance of a tapered simply supported pipe containing moving fluid is explored using the finite element approach in this study. ANSYS software is used to simulate the pipe as Bernoulli's beam theory. In this paper, the fluctuation of natural frequencies and matching mode shapes for various scenarios owing to changes in fluid speed and the presence of damage is discussed in detail. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=damage%20detection" title="damage detection">damage detection</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element" title=" finite element"> finite element</a>, <a href="https://publications.waset.org/abstracts/search?q=tapered%20pipe" title=" tapered pipe"> tapered pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration%20characteristics" title=" vibration characteristics"> vibration characteristics</a> </p> <a href="https://publications.waset.org/abstracts/149937/failure-detection-in-an-edge-cracked-tapered-pipe-conveying-fluid-using-finite-element-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149937.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">169</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">853</span> Examination of Internally and Externally Coated Cr3C2 Exhaust Pipe of a Diesel Engine via Plasma Spray Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Hazar">H. Hazar</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Sap"> S. Sap</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this experimental study; internal and external parts of an exhaust pipe were coated with a chromium carbide (Cr<sub>3</sub>C<sub>2</sub>) material having a thickness of 100 micron by using the plasma spray method. A diesel engine was used as the test engine. Thus, the results of continuing chemical reaction in coated and uncoated exhaust pipes were investigated. Internally and externally coated exhaust pipe was compared with the standard exhaust system. External heat transfer occurring as a result of coating the internal and external parts of the exhaust pipe was reduced and its effects on harmful exhaust emissions were investigated. As a result of the experiments; a remarkable improvement was determined in emission values as a result of delay in cooling of exhaust gases due to the coating. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chrome%20carbide" title="chrome carbide">chrome carbide</a>, <a href="https://publications.waset.org/abstracts/search?q=diesel%20engine" title=" diesel engine"> diesel engine</a>, <a href="https://publications.waset.org/abstracts/search?q=exhaust%20emission" title=" exhaust emission"> exhaust emission</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20barrier" title=" thermal barrier"> thermal barrier</a> </p> <a href="https://publications.waset.org/abstracts/75156/examination-of-internally-and-externally-coated-cr3c2-exhaust-pipe-of-a-diesel-engine-via-plasma-spray-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75156.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">268</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">852</span> Deriving Generic Transformation Matrices for Multi-Axis Milling Machine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alan%20C.%20Lin">Alan C. Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Tzu-Kuan%20Lin"> Tzu-Kuan Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Tsong%20Der%20Lin"> Tsong Der Lin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper proposes a new method to find the equations of transformation matrix for the rotation angles of the two rotational axes and the coordinates of the three linear axes of an orthogonal multi-axis milling machine. This approach provides intuitive physical meanings for rotation angles of multi-axis machines, which can be used to evaluate the accuracy of the conversion from CL data to NC data. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CAM" title="CAM">CAM</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-axis%20milling%20machining" title=" multi-axis milling machining"> multi-axis milling machining</a>, <a href="https://publications.waset.org/abstracts/search?q=transformation%20matrix" title=" transformation matrix"> transformation matrix</a>, <a href="https://publications.waset.org/abstracts/search?q=rotation%20angles" title=" rotation angles"> rotation angles</a> </p> <a href="https://publications.waset.org/abstracts/10895/deriving-generic-transformation-matrices-for-multi-axis-milling-machine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10895.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">482</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">851</span> Performance of the Hybrid Loop Heat Pipe</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nandy%20Putra">Nandy Putra</a>, <a href="https://publications.waset.org/abstracts/search?q=Imansyah%20Ibnu%20Hakim"> Imansyah Ibnu Hakim</a>, <a href="https://publications.waset.org/abstracts/search?q=Iwan%20Setyawan"> Iwan Setyawan</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Zayd%20A.I"> Muhammad Zayd A.I</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A two-phase cooling technology of passive system sometimes can no longer meet the cooling needs of an increasingly challenging due to the inherent limitations of the capillary pumping for example in terms of the heat flux that can lead to dry out. In this study, intended to overcome the dry out with the addition of a diaphragm, they pump to accelerate the fluid transportation from the condenser to the evaporator. Diaphragm pump installed on the bypass line. When it did not happen dry out then the hybrid loop heat pipe will be work passively using a capillary pressure of wick. Meanwhile, when necessary, hybrid loop heat pipe will be work actively, using diaphragm pump with temperature control installed on the evaporator. From the results, it can be said that the pump has been successfully overcome dry out and can distribute working fluid from the condenser to the evaporator and reduce the temperature of the evaporator from 143°C to 100°C as a temperature controlled where the pump start actively at set point 100°C. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hybrid" title="hybrid">hybrid</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20pipe" title=" heat pipe"> heat pipe</a>, <a href="https://publications.waset.org/abstracts/search?q=dry%20out" title=" dry out"> dry out</a>, <a href="https://publications.waset.org/abstracts/search?q=assisted" title=" assisted"> assisted</a>, <a href="https://publications.waset.org/abstracts/search?q=pump" title=" pump "> pump </a> </p> <a href="https://publications.waset.org/abstracts/32171/performance-of-the-hybrid-loop-heat-pipe" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32171.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">352</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">850</span> Gas-Liquid Two Phase Flow Phenomenon in Near Horizontal Upward and Downward Inclined Pipe Orientations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Afshin%20J.%20Ghajar">Afshin J. Ghajar</a>, <a href="https://publications.waset.org/abstracts/search?q=Swanand%20M.%20Bhagwat"> Swanand M. Bhagwat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main purpose of this work is to experimentally investigate the effect of pipe orientation on two phase flow phenomenon. Flow pattern, void fraction and two phase pressure drop is measured in a polycarbonate pipe with an inside diameter of 12.7mm for inclination angles ranging from -20° to +20° using air-water fluid combination. The experimental data covers all flow patterns and the entire range of void fraction typically observed in two phase flow. The effect of pipe orientation on void fraction and two phase pressure drop is justified with reference to the change in flow structure and two phase flow behavior. In addition to this, the top performing void fraction and two phase pressure drop correlations available in the literature are presented and their performance is assessed against the experimental data in the present study and that available in the literature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flow%20patterns" title="flow patterns">flow patterns</a>, <a href="https://publications.waset.org/abstracts/search?q=inclined%20two%20phase%20flow" title=" inclined two phase flow"> inclined two phase flow</a>, <a href="https://publications.waset.org/abstracts/search?q=pressure%20drop" title=" pressure drop"> pressure drop</a>, <a href="https://publications.waset.org/abstracts/search?q=void%20fraction" title=" void fraction "> void fraction </a> </p> <a href="https://publications.waset.org/abstracts/6215/gas-liquid-two-phase-flow-phenomenon-in-near-horizontal-upward-and-downward-inclined-pipe-orientations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6215.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">680</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">849</span> Use of Large Eddy Simulations Model to Simulate the Flow of Heavy Oil-Water-Air through Pipe</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salim%20Al%20Jadidi">Salim Al Jadidi</a>, <a href="https://publications.waset.org/abstracts/search?q=Shian%20Gao"> Shian Gao</a>, <a href="https://publications.waset.org/abstracts/search?q=Shivananda%20Moolya"> Shivananda Moolya</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Computational Fluid Dynamic (CFD) technique coupled with Sub-Grid-Scale (SGS) model is used to study the flow behavior of heavy oil-water-air flow in a horizontal pipe by adapting ANSYS Fluent CFD software. The technique suitable for the transport of water-lubricated heavy viscous oil in a horizontal pipe is the Core Annular flow (CAF) technique. The present study focuses on the numerical study of CAF adapting Large Eddy Simulations (LES). The basic objective of the present study is to gain a basic knowledge of the flow behavior of heavy oil using turbulent CAF through a conventional horizontal pipe. This work also focuses on the success and applicability of LES. The simulation of heavy oil-water-air three-phase flow and two-phase flow of heavy oil–water in a conventional horizontal pipe is performed using ANSYS Fluent 16.2 software. The influence of three-phase heavy oil-water air flow in a selected pipe is affected by gravity. It is also observed from the result that the air phase and the variation in the temperature impact the behavior of the annular stream and pressure drop. Some results obtained during the study are validated with the results gained from part of the literature experiments and simulations, and the results show reasonably good agreement between the studies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamics" title="computational fluid dynamics">computational fluid dynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=gravity" title=" gravity"> gravity</a>, <a href="https://publications.waset.org/abstracts/search?q=heavy%20viscous%20oil" title=" heavy viscous oil"> heavy viscous oil</a>, <a href="https://publications.waset.org/abstracts/search?q=three-phase%20flow" title=" three-phase flow"> three-phase flow</a> </p> <a href="https://publications.waset.org/abstracts/160000/use-of-large-eddy-simulations-model-to-simulate-the-flow-of-heavy-oil-water-air-through-pipe" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/160000.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">77</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">848</span> Characteristics of Elastic Tracked-Crawler Based on Worm-Rack Mechanism</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jun-ya%20Nagase">Jun-ya Nagase</a> </p> <p class="card-text"><strong>Abstract:</strong></p> There are many pipes such as a water pipe and a gas pipe in a chemical plant and house. It is possible to prevent accidents by these inspections. However, many pipes are very narrow and it is difficult for people to inspect directly. Therefore, development of a robot that can move in narrow pipe is necessary. A wheel movement type robot, a snake-like robot and a multi-leg robot are all described in the relevant literature as pipe inspection robots that are currently studied. Among them, the tracked crawler robot can travel by traversing uneven ground flexibly with a crawler belt attached firmly to the ground surface. Although conventional crawler robots have high efficiency and/or high ground-covering ability, they require a comparatively large space to move. In this study, a cylindrical crawler robot based on worm-rack mechanism, which does not need large space to move and which has high ground-covering ability, is proposed. Experiments have demonstrated smooth operation and a forward movement of the robot by application of voltage to the motor. In addition, performance tests show that it can propel itself in confined spaces. This paper reports the structure, drive mechanism, prototype, and experimental evaluation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tracked-crawler" title="tracked-crawler">tracked-crawler</a>, <a href="https://publications.waset.org/abstracts/search?q=pipe%20inspection%20robot" title=" pipe inspection robot"> pipe inspection robot</a>, <a href="https://publications.waset.org/abstracts/search?q=worm-rack%20mechanism" title=" worm-rack mechanism"> worm-rack mechanism</a>, <a href="https://publications.waset.org/abstracts/search?q=amoeba%20locomotion" title=" amoeba locomotion"> amoeba locomotion</a> </p> <a href="https://publications.waset.org/abstracts/4974/characteristics-of-elastic-tracked-crawler-based-on-worm-rack-mechanism" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4974.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">431</span> </span> </div> </div> <ul class="pagination"> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=pipe%20rotation&page=1" rel="prev">&lsaquo;</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=pipe%20rotation&page=1">1</a></li> <li class="page-item active"><span class="page-link">2</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=pipe%20rotation&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=pipe%20rotation&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=pipe%20rotation&page=5">5</a></li> <li class="page-item"><a class="page-link" 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