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Esmaeilzadeh</title> <meta name="description" content="Search results for: Feridun Esmaeilzadeh"> <meta name="keywords" content="Feridun Esmaeilzadeh"> <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 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action="https://publications.waset.org/search"> <div 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="Feridun Esmaeilzadeh"> <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> 8</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Feridun Esmaeilzadeh</h1> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> New Multi-Solid Thermodynamic Model for the Prediction of Wax Formation </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Ehsan%20Ghanaei">Ehsan Ghanaei</a>, <a href="https://publications.waset.org/search?q=Feridun%20Esmaeilzadeh"> Feridun Esmaeilzadeh</a>, <a href="https://publications.waset.org/search?q=Jamshid%20Fathi%20Kaljahi"> Jamshid Fathi Kaljahi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the previous multi-solid models,陇貌 approach is used for the calculation of fugacity in the liquid phase. For the first time, in the proposed multi-solid thermodynamic model,纬 approach has been used for calculation of fugacity in the liquid mixture. Therefore, some activity coefficient models have been studied that the results show that the predictive Wilson model is more appropriate than others. The results demonstrate 纬 approach using the predictive Wilson model is in more agreement with experimental data than the previous multi-solid models. Also, by this method, generates a new approach for presenting stability analysis in phase equilibrium calculations. Meanwhile, the run time in 纬 approach is less than the previous methods used 陇貌 approach. The results of the new model present 0.75 AAD % (Average Absolute Deviation) from the experimental data which is less than the results error of the previous multi-solid models obviously. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Multi-solid%20thermodynamic%20model" title="Multi-solid thermodynamic model">Multi-solid thermodynamic model</a>, <a href="https://publications.waset.org/search?q=PredictiveWilson%20model" title=" PredictiveWilson model"> PredictiveWilson model</a>, <a href="https://publications.waset.org/search?q=Wax%20formation." title=" Wax formation."> Wax formation.</a> </p> <a href="https://publications.waset.org/7848/new-multi-solid-thermodynamic-model-for-the-prediction-of-wax-formation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/7848/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/7848/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/7848/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/7848/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/7848/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/7848/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/7848/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/7848/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/7848/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/7848/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/7848.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">1981</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7</span> Memetic Algorithm Based Path Planning for a Mobile Robot </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Neda%20Shahidi">Neda Shahidi</a>, <a href="https://publications.waset.org/search?q=Hadi%20Esmaeilzadeh"> Hadi Esmaeilzadeh</a>, <a href="https://publications.waset.org/search?q=Marziye%20Abdollahi"> Marziye Abdollahi</a>, <a href="https://publications.waset.org/search?q=Caro%20Lucas"> Caro Lucas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>In this paper, the problem of finding the optimal collision free path for a mobile robot, the path planning problem, is solved using an advanced evolutionary algorithm called memetic algorithm. What is new in this work is a novel representation of solutions for evolutionary algorithms that is efficient, simple and also compatible with memetic algorithm. The new representation makes it possible to solve the problem with a small population and in a few generations. It also makes the genetic operator simple and allows using an efficient local search operator within the evolutionary algorithm. The proposed algorithm is applied to two instances of path planning problem and the results are available.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Path%20planning%20problem" title="Path planning problem">Path planning problem</a>, <a href="https://publications.waset.org/search?q=Memetic%20Algorithm" title=" Memetic Algorithm"> Memetic Algorithm</a>, <a href="https://publications.waset.org/search?q=Representation." title="Representation.">Representation.</a> </p> <a href="https://publications.waset.org/3903/memetic-algorithm-based-path-planning-for-a-mobile-robot" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/3903/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/3903/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/3903/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/3903/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/3903/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/3903/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/3903/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/3903/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/3903/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/3903/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/3903.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">1740</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> Experimental Study on Temperature Dependence of Absorption and Emission Properties of Yb:YAG Crystal as a Disk Laser Medium</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=M.%20Esmaeilzadeh">M. Esmaeilzadeh</a>, <a href="https://publications.waset.org/search?q=H.%20Roohbakhsh"> H. Roohbakhsh</a>, <a href="https://publications.waset.org/search?q=A.%20Ghaedzadeh"> A. Ghaedzadeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the absorption and fluorescence emission spectra of Yb:Y3Al5O12 (YAG)(25 at%) crystal as a disk laser medium are measured at high temperature (300-450K). The absorption and emission cross sections of Yb:YAG crystal are determined using Reciprocity method. Temperature dependence of 941nm absorption cross section and 1031nm emission cross section is extracted in the range of 300-450K. According to our experimental results, an exponential temperature dependence between 300K and 450K is acquired for the 1031nm peak emission cross section and also for 941nm peak absorption cross section of Yb:YAG crystal. These results could be used for simulation and design of high power highly doped Yb:YAG thin disk lasers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Yb%3AYAG%20crystal" title="Yb:YAG crystal">Yb:YAG crystal</a>, <a href="https://publications.waset.org/search?q=Emission%20cross%20section" title=" Emission cross section"> Emission cross section</a>, <a href="https://publications.waset.org/search?q=Absorption%0Acoefficient" title=" Absorption coefficient"> Absorption coefficient</a>, <a href="https://publications.waset.org/search?q=Temperature%20dependence" title=" Temperature dependence"> Temperature dependence</a>, <a href="https://publications.waset.org/search?q=Reciprocity%20method." title=" Reciprocity method."> Reciprocity method.</a> </p> <a href="https://publications.waset.org/13958/experimental-study-on-temperature-dependence-of-absorption-and-emission-properties-of-ybyag-crystal-as-a-disk-laser-medium" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/13958/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/13958/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/13958/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/13958/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/13958/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/13958/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/13958/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/13958/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/13958/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/13958/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/13958.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">3200</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> 1-D Modeling of Hydrate Decomposition in Porous Media</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=F.%20Esmaeilzadeh">F. Esmaeilzadeh</a>, <a href="https://publications.waset.org/search?q=M.%20E.%20Zeighami"> M. E. Zeighami</a>, <a href="https://publications.waset.org/search?q=J.%20Fathi"> J. Fathi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>This paper describes a one-dimensional numerical model for natural gas production from the dissociation of methane hydrate in hydrate-capped gas reservoir under depressurization and thermal stimulation. Some of the hydrate reservoirs discovered are overlying a free-gas layer, known as hydrate-capped gas reservoirs. These reservoirs are thought to be easiest and probably the first type of hydrate reservoirs to be produced. The mathematical equations that can be described this type of reservoir include mass balance, heat balance and kinetics of hydrate decomposition. These non-linear partial differential equations are solved using finite-difference fully implicit scheme. In the model, the effect of convection and conduction heat transfer, variation change of formation porosity, the effect of using different equations of state such as PR and ER and steam or hot water injection are considered. In addition distributions of pressure, temperature, saturation of gas, hydrate and water in the reservoir are evaluated. It is shown that the gas production rate is a sensitive function of well pressure.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Hydrate%20reservoir" title="Hydrate reservoir">Hydrate reservoir</a>, <a href="https://publications.waset.org/search?q=numerical%20modeling" title=" numerical modeling"> numerical modeling</a>, <a href="https://publications.waset.org/search?q=depressurization" title=" depressurization"> depressurization</a>, <a href="https://publications.waset.org/search?q=thermal%20stimulation" title=" thermal stimulation"> thermal stimulation</a>, <a href="https://publications.waset.org/search?q=gas%20generation." title=" gas generation."> gas generation.</a> </p> <a href="https://publications.waset.org/3808/1-d-modeling-of-hydrate-decomposition-in-porous-media" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/3808/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/3808/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/3808/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/3808/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/3808/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/3808/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/3808/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/3808/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/3808/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/3808/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/3808.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">2054</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Using FEM for Prediction of Thermal Post-Buckling Behavior of Thin Plates During Welding Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Amin%20Esmaeilzadeh">Amin Esmaeilzadeh</a>, <a href="https://publications.waset.org/search?q=Mohammad%20Sadeghi"> Mohammad Sadeghi</a>, <a href="https://publications.waset.org/search?q=Farhad%20Kolahan"> Farhad Kolahan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>Arc welding is an important joining process widely used in many industrial applications including production of automobile, ships structures and metal tanks. In welding process, the moving electrode causes highly non-uniform temperature distribution that leads to residual stresses and different deviations, especially buckling distortions in thin plates. In order to control the deviations and increase the quality of welded plates, a fixture can be used as a practical and low cost method with high efficiency. In this study, a coupled thermo-mechanical finite element model is coded in the software ANSYS to simulate the behavior of thin plates located by a 3-2-1 positioning system during the welding process. Computational results are compared with recent similar works to validate the finite element models. The agreement between the result of proposed model and other reported data proves that finite element modeling can accurately predict the behavior of welded thin plates.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Welding" title="Welding">Welding</a>, <a href="https://publications.waset.org/search?q=thin%20plate" title=" thin plate"> thin plate</a>, <a href="https://publications.waset.org/search?q=buckling%20distortion" title=" buckling distortion"> buckling distortion</a>, <a href="https://publications.waset.org/search?q=fixture%20locators" title=" fixture locators"> fixture locators</a>, <a href="https://publications.waset.org/search?q=finite%20element%20modelling." title=" finite element modelling."> finite element modelling.</a> </p> <a href="https://publications.waset.org/11334/using-fem-for-prediction-of-thermal-post-buckling-behavior-of-thin-plates-during-welding-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/11334/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/11334/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/11334/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/11334/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/11334/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/11334/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/11334/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/11334/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/11334/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/11334/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/11334.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">2410</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Experimental Investigation of Convective Heat Transfer and Pressure Drop of Al2O3/Water Nanofluid in Laminar Flow Regime inside a Circular Tube</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=H.%20Almohammadi">H. Almohammadi</a>, <a href="https://publications.waset.org/search?q=Sh.%20Nasiri%20Vatan"> Sh. Nasiri Vatan</a>, <a href="https://publications.waset.org/search?q=E.%20Esmaeilzadeh"> E. Esmaeilzadeh</a>, <a href="https://publications.waset.org/search?q=A.%20Motezaker"> A. Motezaker</a>, <a href="https://publications.waset.org/search?q=A.%20Nokhosteen"> A. Nokhosteen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present study, Convective heat transfer coefficient and pressure drop of Al2O3/water nanofluid in laminar flow regime under constant heat flux conditions inside a circular tube were experimentally investigated. Al2O3/water nanofluid with 0.5% and 1% volume concentrations with 15 nm diameter nanoparticles were used as working fluid. The effect of different volume concentrations on convective heat transfer coefficient and friction factor was studied. The results emphasize that increasing of particle volume concentration leads to enhance convective heat transfer coefficient. Measurements show the average heat transfer coefficient enhanced about 11-20% with 0.5% volume concentration and increased about 16-27% with 1% volume concentration compared to distilled water. In addition, the convective heat transfer coefficient of nanofluid enhances with increase in heat flux. From the results, the average ratio of (fnf/fbf) was about 1.10 for 0.5% volume concentration. Therefore, there is no significant increase in friction factor for nanofluids. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Convective%20heat%20transfer" title="Convective heat transfer">Convective heat transfer</a>, <a href="https://publications.waset.org/search?q=Laminar%20flow%20regime" title=" Laminar flow regime"> Laminar flow regime</a>, <a href="https://publications.waset.org/search?q=Nanofluids" title=" Nanofluids"> Nanofluids</a>, <a href="https://publications.waset.org/search?q=Pressure%20drop" title=" Pressure drop"> Pressure drop</a> </p> <a href="https://publications.waset.org/5436/experimental-investigation-of-convective-heat-transfer-and-pressure-drop-of-al2o3water-nanofluid-in-laminar-flow-regime-inside-a-circular-tube" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/5436/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/5436/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/5436/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/5436/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/5436/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/5436/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/5436/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/5436/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/5436/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/5436/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/5436.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">3768</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> The Effect of Tool Path Strategy on Surface and Dimension in High Speed Milling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=A.%20Razavykia">A. Razavykia</a>, <a href="https://publications.waset.org/search?q=A.%20Esmaeilzadeh"> A. Esmaeilzadeh</a>, <a href="https://publications.waset.org/search?q=S.%20Iranmanesh"> S. Iranmanesh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many orthopedic implants like proximal humerus cases require lower surface roughness and almost immediate/short lead time surgery. Thus, rapid response from the manufacturer is very crucial. Tool path strategy of milling process has a direct influence on the surface roughness and lead time of medical implant. High-speed milling as promised process would improve the machined surface quality, but conventional or super-abrasive grinding still required which imposes some drawbacks such as additional costs and time. Currently, many CAD/CAM software offers some different tool path strategies to milling free form surfaces. Nevertheless, the users must identify how to choose the strategies according to cutting tool geometry, geometry complexity, and their effects on the machined surface. This study investigates the effect of different tool path strategies for milling a proximal humerus head during finishing operation on stainless steel 316L. Experiments have been performed using MAHO MH700 S vertical milling machine and four machining strategies, namely, spiral outward, spiral inward, and radial as well as zig-zag. In all cases, the obtained surfaces were analyzed in terms of roughness and dimension accuracy compared with those obtained by simulation. The findings provide evidence that surface roughness, dimensional accuracy, and machining time have been affected by the considered tool path strategy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=CAD%2FCAM%20software" title="CAD/CAM software">CAD/CAM software</a>, <a href="https://publications.waset.org/search?q=milling" title=" milling"> milling</a>, <a href="https://publications.waset.org/search?q=orthopedic%20implants" title=" orthopedic implants"> orthopedic implants</a>, <a href="https://publications.waset.org/search?q=tool%20path%20strategy." title=" tool path strategy. "> tool path strategy. </a> </p> <a href="https://publications.waset.org/10007860/the-effect-of-tool-path-strategy-on-surface-and-dimension-in-high-speed-milling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10007860/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/10007860/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/10007860/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/10007860/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/10007860/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/10007860/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/10007860/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/10007860/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/10007860/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/10007860/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/10007860.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">996</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Experimental Investigation of a Mixture of Methane, Carbon Dioxide and Nitrogen Gas Hydrate Formation in Water-Based Drilling Mud in the Presence or Absence of Thermodynamic Inhibitors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=F.%20Esmaeilzadeh">F. Esmaeilzadeh</a>, <a href="https://publications.waset.org/search?q=Y.%20Fayazi"> Y. Fayazi</a>, <a href="https://publications.waset.org/search?q=J.%20Fathikaljahi"> J. Fathikaljahi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Gas hydrates form when a number of factors co-exist: free water, hydrocarbon gas, cold temperatures and high pressures are typical of the near mud-line conditions in a deepwater drilling operation. Subsequently, when drilling with water based muds, particularly on exploration wells, the risk of hydrate formation associated with a gas influx is high. The consequences of gas hydrate formation while drilling are severe, and as such, every effort should be made to ensure the risk of hydrate formation is either eliminated or significantly reduced. Thermodynamic inhibitors are used to reduce the free water content of a drilling mud, and thus suppress the hydrate formation temperature. Very little experimental work has been performed by oil and gas research companies on the evaluation of gas hydrate formation in a water-based drilling mud. The main objective of this paper is to investigate the experimental gas hydrate formation for a mixture of methane, carbon dioxide & nitrogen in a water-based drilling mud with or without presence of different concentrations of thermodynamic inhibitors including pure salt and a combination of salt with methanol or ethylene glycol at different concentrations in a static loop apparatus. The experiments were performed using a static loop apparatus consisting of a 2.4307 cm inside diameter and 800 cm long pipe. All experiments were conducted at 2200 psia. The temperature in the loop was decreased at a rate of 3.33 掳F/h from initial temperature of 80 掳F. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Hydrate%20formation" title="Hydrate formation">Hydrate formation</a>, <a href="https://publications.waset.org/search?q=thermodynamic%20inhibitor" title=" thermodynamic inhibitor"> thermodynamic inhibitor</a>, <a href="https://publications.waset.org/search?q=waterbaseddrilling%20mud" title=" waterbaseddrilling mud"> waterbaseddrilling mud</a>, <a href="https://publications.waset.org/search?q=salt" title=" salt"> salt</a>, <a href="https://publications.waset.org/search?q=static%20loop%20apparatus." title=" static loop apparatus."> static loop apparatus.</a> </p> <a href="https://publications.waset.org/6011/experimental-investigation-of-a-mixture-of-methane-carbon-dioxide-and-nitrogen-gas-hydrate-formation-in-water-based-drilling-mud-in-the-presence-or-absence-of-thermodynamic-inhibitors" 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