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</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> 3845</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: numerical dissipation</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3845</span> Numerical Modeling of Flow in USBR II Stilling Basin with End Adverse Slope</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hamidreza%20Babaali">Hamidreza Babaali</a>, <a href="https://publications.waset.org/abstracts/search?q=Alireza%20Mojtahedi"> Alireza Mojtahedi</a>, <a href="https://publications.waset.org/abstracts/search?q=Nasim%20Soori"> Nasim Soori</a>, <a href="https://publications.waset.org/abstracts/search?q=Saba%20Soori"> Saba Soori</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydraulic jump is one of the effective ways of energy dissipation in stilling basins that the &lrm;energy is highly dissipated by jumping. Adverse slope surface at the end stilling basin is &lrm;caused to increase energy dissipation and stability of the hydraulic jump. In this study, the adverse slope &lrm;has been added to end of United States Bureau of Reclamation (USBR) II stilling basin in hydraulic model of Nazloochay dam with scale 1:40, and flow simulated into stilling basin using Flow-3D &lrm;software. The numerical model is verified by experimental data of water depth in &lrm;stilling basin. Then, the parameters of water level profile, Froude Number, pressure, air &lrm;entrainment and turbulent dissipation investigated for discharging 300 m<sup>3</sup>/s using K-Ɛ and Re-Normalization Group (RNG) turbulence &lrm;models. The results showed a good agreement between numerical and experimental model&lrm; as &lrm;numerical model can be used to optimize of stilling basins.&lrm; <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=experimental%20and%20numerical%20modelling" title="experimental and numerical modelling">experimental and numerical modelling</a>, <a href="https://publications.waset.org/abstracts/search?q=end%20adverse%20slope" title=" end adverse slope"> end adverse slope</a>, <a href="https://publications.waset.org/abstracts/search?q=flow%20%E2%80%8Eparameters" title=" flow ‎parameters"> flow ‎parameters</a>, <a href="https://publications.waset.org/abstracts/search?q=USBR%20II%20stilling%20basin" title=" USBR II stilling basin"> USBR II stilling basin</a> </p> <a href="https://publications.waset.org/abstracts/93364/numerical-modeling-of-flow-in-usbr-ii-stilling-basin-with-end-adverse-slope" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93364.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">184</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">3844</span> Numerical Analysis of the Effect of Height and Rate of Fluid Flow on a Stepped Spillway</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amir%20Abbas%20Kamanbedast">Amir Abbas Kamanbedast</a>, <a href="https://publications.waset.org/abstracts/search?q=Abbas%20Saki"> Abbas Saki </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Stepped spillways are composed of several steps, which start from around the spillway crest and continue to the downstream heel. Recently, such spillways have been receiving increasing attention due to the significant effect of the associated stairs on the flow’s rate of energy dissipation. Energy dissipation in the stepped spillways across the overflow can be explained by the watercourse contact with the stairs (i.e., large, harsh surfaces). In this context, less energy must be dissipated at the end of the spillway, and, hence, a smaller (less expensive) energy-dissipating structure is required. In this study, a stepped spillway was simulated using the model Fluent 3, and a standard model was used to model the flow disturbance. For this purpose, the energy dissipation from the stepped spillway was investigated in terms of the different numbers of stairs involved. Using k-ε, the disturbances of the numerical method for velocity and of flow depth at the downstream overflow were obtained, and, then, the energy that was dissipated throughout the spillway was calculated. Our results showed that an increase in the number of stairs can considerably increase the amount of energy dissipation for the fixed, upstream energy. In addition, the results of the numerical analyses were provided as isobar and velocity curves so points that were sensitive to cavitation could be determined. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=stepped%20spillway" title="stepped spillway">stepped spillway</a>, <a href="https://publications.waset.org/abstracts/search?q=fluent%20software" title=" fluent software"> fluent software</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulence%20model%20of%20k-%CE%B5" title=" turbulence model of k-ε"> turbulence model of k-ε</a>, <a href="https://publications.waset.org/abstracts/search?q=VOF%20model" title=" VOF model"> VOF model</a> </p> <a href="https://publications.waset.org/abstracts/45509/numerical-analysis-of-the-effect-of-height-and-rate-of-fluid-flow-on-a-stepped-spillway" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45509.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">305</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">3843</span> Modelling of Polymeric Fluid Flows between Two Coaxial Cylinders Taking into Account the Heat Dissipation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alexander%20Blokhin">Alexander Blokhin</a>, <a href="https://publications.waset.org/abstracts/search?q=Ekaterina%20Kruglova"> Ekaterina Kruglova</a>, <a href="https://publications.waset.org/abstracts/search?q=Boris%20Semisalov"> Boris Semisalov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mathematical model based on the mesoscopic theory of polymer dynamics is developed for numerical simulation of the flows of polymeric liquid between two coaxial cylinders. This model is a system of nonlinear partial differential equations written in the cylindrical coordinate system and coupled with the heat conduction equation including a specific dissipation term. The stationary flows similar to classical Poiseuille ones are considered, and the resolving equations for the velocity of flow and for the temperature are obtained. For solving them, a fast pseudospectral method is designed based on Chebyshev approximations, that enables one to simulate the flows through the channels with extremely small relative values of the radius of inner cylinder. The numerical analysis of the dependance of flow on this radius and on the values of dissipation constant is done. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dynamics%20of%20polymeric%20liquid" title="dynamics of polymeric liquid">dynamics of polymeric liquid</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20dissipation" title=" heat dissipation"> heat dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=singularly%20perturbed%20problem" title=" singularly perturbed problem"> singularly perturbed problem</a>, <a href="https://publications.waset.org/abstracts/search?q=pseudospectral%20method" title=" pseudospectral method"> pseudospectral method</a>, <a href="https://publications.waset.org/abstracts/search?q=Chebyshev%20polynomials" title=" Chebyshev polynomials"> Chebyshev polynomials</a>, <a href="https://publications.waset.org/abstracts/search?q=stabilization%20technique" title=" stabilization technique"> stabilization technique</a> </p> <a href="https://publications.waset.org/abstracts/85108/modelling-of-polymeric-fluid-flows-between-two-coaxial-cylinders-taking-into-account-the-heat-dissipation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/85108.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">296</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">3842</span> A New Family of Integration Methods for Nonlinear Dynamic Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shuenn-Yih%20Chang">Shuenn-Yih Chang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chiu-LI%20Huang"> Chiu-LI Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Ngoc-Cuong%20Tran"> Ngoc-Cuong Tran</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A new family of structure-dependent integration methods, whose coefficients of the difference equation for displacement increment are functions of the initial structural properties and the step size for time integration, is proposed in this work. This family method can simultaneously integrate the controllable numerical dissipation, explicit formulation and unconditional stability together. In general, its numerical dissipation can be continuously controlled by a parameter and it is possible to achieve zero damping. In addition, it can have high-frequency damping to suppress or even remove the spurious oscillations high frequency modes. Whereas, the low frequency modes can be very accurately integrated due to the almost zero damping for these low frequency modes. It is shown herein that the proposed family method can have exactly the same numerical properties as those of HHT-α method for linear elastic systems. In addition, it still preserves the most important property of a structure-dependent integration method, which is an explicit formulation for each time step. Consequently, it can save a huge computational efforts in solving inertial problems when compared to the HHT-α method. In fact, it is revealed by numerical experiments that the CPU time consumed by the proposed family method is only about 1.6% of that consumed by the HHT-α method for the 125-DOF system while it reduces to be 0.16% for the 1000-DOF system. Apparently, the saving of computational efforts is very significant. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=structure-dependent%20integration%20method" title="structure-dependent integration method">structure-dependent integration method</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20dynamic%20analysis" title=" nonlinear dynamic analysis"> nonlinear dynamic analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=unconditional%20stability" title=" unconditional stability"> unconditional stability</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20dissipation" title=" numerical dissipation"> numerical dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=accuracy" title=" accuracy"> accuracy</a> </p> <a href="https://publications.waset.org/abstracts/22306/a-new-family-of-integration-methods-for-nonlinear-dynamic-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22306.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">644</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">3841</span> Zero-Dissipative Explicit Runge-Kutta Method for Periodic Initial Value Problems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Senu">N. Senu</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20A.%20Kasim"> I. A. Kasim</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Ismail"> F. Ismail</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Bachok"> N. Bachok</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper zero-dissipative explicit Runge-Kutta method is derived for solving second-order ordinary differential equations with periodical solutions. The phase-lag and dissipation properties for Runge-Kutta (RK) method are also discussed. The new method has algebraic order three with dissipation of order infinity. The numerical results for the new method are compared with existing method when solving the second-order differential equations with periodic solutions using constant step size. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dissipation" title="dissipation">dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=oscillatory%20solutions" title=" oscillatory solutions"> oscillatory solutions</a>, <a href="https://publications.waset.org/abstracts/search?q=phase-lag" title=" phase-lag"> phase-lag</a>, <a href="https://publications.waset.org/abstracts/search?q=Runge-Kutta%20methods" title=" Runge-Kutta methods "> Runge-Kutta methods </a> </p> <a href="https://publications.waset.org/abstracts/13272/zero-dissipative-explicit-runge-kutta-method-for-periodic-initial-value-problems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13272.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">416</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">3840</span> Effects of Viscous Dissipation on Free Convection Boundary Layer Flow towards a Horizontal Circular Cylinder </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Khairul%20Anuar%20Mohamed">Muhammad Khairul Anuar Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohd%20Zuki%20Salleh"> Mohd Zuki Salleh</a>, <a href="https://publications.waset.org/abstracts/search?q=Anuar%20Ishak"> Anuar Ishak</a>, <a href="https://publications.waset.org/abstracts/search?q=Nor%20Aida%20Zuraimi%20Md%20Noar"> Nor Aida Zuraimi Md Noar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the numerical investigation of viscous dissipation on convective boundary layer flow towards a horizontal circular cylinder with constant wall temperature is considered. The transformed partial differential equations are solved numerically by using an implicit finite-difference scheme known as the Keller-box method. Numerical solutions are obtained for the reduced Nusselt number and the skin friction coefficient as well as the velocity and temperature profiles. The features of the flow and heat transfer characteristics for various values of the Prandtl number and Eckert number are analyzed and discussed. The results in this paper is original and important for the researchers working in the area of boundary layer flow and this can be used as reference and also as complement comparison purpose in future. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=free%20convection" title="free convection">free convection</a>, <a href="https://publications.waset.org/abstracts/search?q=horizontal%20circular%20cylinder" title=" horizontal circular cylinder"> horizontal circular cylinder</a>, <a href="https://publications.waset.org/abstracts/search?q=viscous%20dissipation" title=" viscous dissipation"> viscous dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=convective%20boundary%20layer%20flow" title=" convective boundary layer flow"> convective boundary layer flow</a> </p> <a href="https://publications.waset.org/abstracts/21742/effects-of-viscous-dissipation-on-free-convection-boundary-layer-flow-towards-a-horizontal-circular-cylinder" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21742.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">445</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">3839</span> Numerical Investigation of Al2O3/Water Nanofluid Heat Transfer in a Microtube with Viscous Dissipation Effect</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Misagh%20Irandoost%20Shahrestani">Misagh Irandoost Shahrestani</a>, <a href="https://publications.waset.org/abstracts/search?q=Hossein%20Shokouhmand"> Hossein Shokouhmand</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Kalteh"> Mohammad Kalteh</a>, <a href="https://publications.waset.org/abstracts/search?q=Behrang%20Hasanpour"> Behrang Hasanpour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, nanofluid conjugate heat transfer through a microtube with viscous dissipation effect is investigated numerically. The fluid flow is considered as a laminar regime. A constant heat flux is applied on the microtube outer wall and the two ends of its wall are considered adiabatic. Conjugate heat transfer problem is solved and investigated for this geometry. It is shown that viscous dissipation effect which is induced by shear stresses can not be neglected in microtubes. Viscous heating behaves as an energy source in the fluid and affects the temperature distribution. The effect of Reynolds number, particle volume fraction and the nanoparticles diameter on the energy source are investigated and an attempt on establishing suitable equations for assessing the value of the energy source based on Re, Dp and Φ is performed and they are depicted as 3D diagrams. Finally, the significance of viscous dissipation and the influence of these parameters on convective heat transfer coefficient are studied. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=convective%20heat%20transfer%20coefficient" title="convective heat transfer coefficient">convective heat transfer coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title=" heat transfer"> heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=microtube" title=" microtube"> microtube</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofluid" title=" nanofluid"> nanofluid</a>, <a href="https://publications.waset.org/abstracts/search?q=viscous%20dissipation" title=" viscous dissipation"> viscous dissipation</a> </p> <a href="https://publications.waset.org/abstracts/15475/numerical-investigation-of-al2o3water-nanofluid-heat-transfer-in-a-microtube-with-viscous-dissipation-effect" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15475.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">520</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">3838</span> Magnetohydrodynamics (MHD) Boundary Layer Flow Past A Stretching Plate with Heat Transfer and Viscous Dissipation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jiya%20Mohammed">Jiya Mohammed</a>, <a href="https://publications.waset.org/abstracts/search?q=Tsadu%20Shuaib"> Tsadu Shuaib</a>, <a href="https://publications.waset.org/abstracts/search?q=Yusuf%20Abdulhakeem"> Yusuf Abdulhakeem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The research work focuses on the cases of MHD boundary layer flow past a stretching plate with heat transfer and viscous dissipation. The non-linear of momentum and energy equation are transform into ordinary differential equation by using similarity transformation, the resulting equation are solved using Adomian Decomposition Method (ADM). An attempt has been made to show the potentials and wide range application of the Adomian decomposition method in the comparison with the previous one in solving heat transfer problems. The Pade approximates value (η= 11[11, 11]) is use on the difficulty at infinity. The results are compared by numerical technique method. A vivid conclusion can be drawn from the results that ADM provides highly precise numerical solution for non-linear differential equations. The result where accurate especially for η ≤ 4, a general equating terms of Eckert number (Ec), Prandtl number (Pr) and magnetic parameter ( ) is derived which was used to investigate velocity and temperature profiles in boundary layer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MHD" title="MHD">MHD</a>, <a href="https://publications.waset.org/abstracts/search?q=Adomian%20decomposition" title=" Adomian decomposition"> Adomian decomposition</a>, <a href="https://publications.waset.org/abstracts/search?q=boundary%20layer" title=" boundary layer"> boundary layer</a>, <a href="https://publications.waset.org/abstracts/search?q=viscous%20dissipation" title=" viscous dissipation"> viscous dissipation</a> </p> <a href="https://publications.waset.org/abstracts/27223/magnetohydrodynamics-mhd-boundary-layer-flow-past-a-stretching-plate-with-heat-transfer-and-viscous-dissipation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27223.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">558</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">3837</span> Effect of Viscous Dissipation on 3-D MHD Casson Flow in Presence of Chemical Reaction: A Numerical Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bandari%20Shanker">Bandari Shanker</a>, <a href="https://publications.waset.org/abstracts/search?q=Alfunsa%20Prathiba"> Alfunsa Prathiba</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The influence of viscous dissipation on MHD Casson 3-D fluid flow in two perpendicular directions past a linearly stretching sheet in the presence of a chemical reaction is explored in this work. For exceptional circumstances, self-similar solutions are obtained and compared to the given data. The enhancement in the values Ecert number the temperature boundary layer increases. Further, the current findings are observed to be in great accord with the existing data. In both directions, non - dimensional velocities and stress distribution are achieved. The relevant data are graphed and explained quantitatively in relation to changes in the Casson fluid parameter as well as other fluid flow parameters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=viscous%20dissipation" title="viscous dissipation">viscous dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=3-D%20Casson%20flow" title=" 3-D Casson flow"> 3-D Casson flow</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20reaction" title=" chemical reaction"> chemical reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=Ecert%20number" title=" Ecert number"> Ecert number</a> </p> <a href="https://publications.waset.org/abstracts/144926/effect-of-viscous-dissipation-on-3-d-mhd-casson-flow-in-presence-of-chemical-reaction-a-numerical-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/144926.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">196</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">3836</span> Experimental and Numerical Study of Thermal Effects in Variable Density Turbulent Jets </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=DRIS%20Mohammed%20El-Amine">DRIS Mohammed El-Amine</a>, <a href="https://publications.waset.org/abstracts/search?q=BOUNIF%20Abdelhamid"> BOUNIF Abdelhamid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper considers an experimental and numerical investigation of variable density in axisymmetric turbulent free jets. Special attention is paid to the study of the scalar dissipation rate. In this case, dynamic field equations are coupled to scalar field equations by the density which can vary by the thermal effect (jet heating). The numerical investigation is based on the first and second order turbulence models. For the discretization of the equations system characterizing the flow, the finite volume method described by Patankar (1980) was used. The experimental study was conducted in order to evaluate dynamical characteristics of a heated axisymmetric air flow using the Laser Doppler Anemometer (LDA) which is a very accurate optical measurement method. Experimental and numerical results are compared and discussed. This comparison do not show large difference and the results obtained are in general satisfactory. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Scalar%20dissipation%20rate" title="Scalar dissipation rate">Scalar dissipation rate</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20effects" title=" thermal effects"> thermal effects</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulent%20axisymmetric%20jets" title=" turbulent axisymmetric jets"> turbulent axisymmetric jets</a>, <a href="https://publications.waset.org/abstracts/search?q=second%20order%20modelling" title=" second order modelling"> second order modelling</a>, <a href="https://publications.waset.org/abstracts/search?q=Velocimetry%20Laser%20Doppler." title=" Velocimetry Laser Doppler."> Velocimetry Laser Doppler.</a> </p> <a href="https://publications.waset.org/abstracts/19513/experimental-and-numerical-study-of-thermal-effects-in-variable-density-turbulent-jets" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19513.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">455</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">3835</span> Seismic Performance of Various Grades of Steel Columns through Finite Element Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asal%20Pournaghshband">Asal Pournaghshband</a>, <a href="https://publications.waset.org/abstracts/search?q=Roham%20Maher"> Roham Maher</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study presents a numerical analysis of the cyclic behavior of H-shaped steel columns, focusing on different steel grades, including austenitic, ferritic, duplex stainless steel, and carbon steel. Finite Element (FE) models were developed and validated against experimental data, demonstrating a predictive accuracy of up to 6.5%. The study examined key parameters such as energy dissipation and failure modes. Results indicate that duplex stainless steel offers the highest strength, with superior energy dissipation but a tendency for brittle failure at maximum strains of 0.149. Austenitic stainless steel demonstrated balanced performance with excellent ductility and energy dissipation, showing a maximum strain of 0.122, making it highly suitable for seismic applications. Ferritic stainless steel, while stronger than carbon steel, exhibited reduced ductility and energy absorption. Carbon steel displayed the lowest performance in terms of energy dissipation and ductility, with significant strain concentrations leading to earlier failure. These findings provide critical insights into optimizing material selection for earthquake-resistant structures, balancing strength, ductility, and energy dissipation under seismic conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=energy%20dissipation" title="energy dissipation">energy dissipation</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=H-shaped%20columns" title=" H-shaped columns"> H-shaped columns</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20performance" title=" seismic performance"> seismic performance</a>, <a href="https://publications.waset.org/abstracts/search?q=stainless%20steel%20grades" title=" stainless steel grades"> stainless steel grades</a> </p> <a href="https://publications.waset.org/abstracts/191066/seismic-performance-of-various-grades-of-steel-columns-through-finite-element-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/191066.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">43</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">3834</span> Surveying Energy Dissipation in Stepped Spillway Using Finite Element Modeling </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Fuladipanah">Mehdi Fuladipanah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Stepped spillway includes several steps from the crest to the toe. The steps of stepped spillway could cause to decrease the energy with making energy distribution in the longitude mode and also to reduce the outcome speed. The aim of this study was to stimulate the stepped spillway combined with stilling basin-step using Fluent model and the turbulent superficial flow using RNG, K-ε. The free surface of the flow was monitored by VOF model. The velocity and the depth of the flow were measured by tail water depth by the numerical model and then the dissipated energy was calculated along the spillway. The results indicated that the stilling basin-step complex may cause energy dissipation increment in the stepped spillway. Also, the numerical model was suggested as an effective method to predict the circular and complicated flows in the stepped spillways. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=stepped%20spillway" title="stepped spillway">stepped spillway</a>, <a href="https://publications.waset.org/abstracts/search?q=fluent%20model" title=" fluent model"> fluent model</a>, <a href="https://publications.waset.org/abstracts/search?q=VOF%20model" title=" VOF model"> VOF model</a>, <a href="https://publications.waset.org/abstracts/search?q=K-%CE%B5%20model" title=" K-ε model"> K-ε model</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20distribution" title=" energy distribution"> energy distribution</a> </p> <a href="https://publications.waset.org/abstracts/26972/surveying-energy-dissipation-in-stepped-spillway-using-finite-element-modeling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26972.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">374</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">3833</span> Boundary Motion by Curvature: Accessible Modeling of Oil Spill Evaporation/Dissipation </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gary%20Miller">Gary Miller</a>, <a href="https://publications.waset.org/abstracts/search?q=Andriy%20Didenko"> Andriy Didenko</a>, <a href="https://publications.waset.org/abstracts/search?q=David%20Allison"> David Allison</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The boundary of a region in the plane shrinks according to its curvature. A simple algorithm based upon this motion by curvature performed by a spreadsheet simulates the evaporation/dissipation behavior of oil spill boundaries. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mathematical%20modeling" title="mathematical modeling">mathematical modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=oil" title=" oil"> oil</a>, <a href="https://publications.waset.org/abstracts/search?q=evaporation" title=" evaporation"> evaporation</a>, <a href="https://publications.waset.org/abstracts/search?q=dissipation" title=" dissipation"> dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=boundary" title=" boundary"> boundary</a> </p> <a href="https://publications.waset.org/abstracts/13621/boundary-motion-by-curvature-accessible-modeling-of-oil-spill-evaporationdissipation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13621.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">516</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">3832</span> Statistical Estimation of Ionospheric Energy Dissipation Using ØStgaard's Empirical Relation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Ahmadu">M. A. Ahmadu</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20S.%20Rabia"> S. S. Rabia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> During the past few decades, energy dissipation in the ionosphere resulting from the geomagnetic activity has caused an increasing number of major disruptions of important power and communication services, malfunctions and loss of expensive facilities. Here, the electron precipitation energy, w(ep) and joule heating energy, w(jh) was used in the computation of this dissipation using Østgaard’s empirical relation from hourly geomagnetic indices of 2012, under the assumption that the magnetosphere does not store any energy, so that at the beginning of the activity t1=0 and end at t2=t, the statistical results obtained show that ionospheric dissipation varies month to month, day to day and hour to hour and estimated with a value ~3.6 w(ep), which is in agreement with experimental result. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ostgaard%27s" title="Ostgaard's">Ostgaard's</a>, <a href="https://publications.waset.org/abstracts/search?q=ionospheric%20dissipation" title=" ionospheric dissipation"> ionospheric dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=joule%20heating" title=" joule heating"> joule heating</a>, <a href="https://publications.waset.org/abstracts/search?q=electron%20precipitation" title=" electron precipitation"> electron precipitation</a>, <a href="https://publications.waset.org/abstracts/search?q=geomagnetic%20indices" title=" geomagnetic indices"> geomagnetic indices</a>, <a href="https://publications.waset.org/abstracts/search?q=empirical%20relation" title=" empirical relation"> empirical relation</a> </p> <a href="https://publications.waset.org/abstracts/49162/statistical-estimation-of-ionospheric-energy-dissipation-using-ostgaards-empirical-relation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49162.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">300</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">3831</span> Large Eddy Simulation with Energy-Conserving Schemes: Understanding Wind Farm Aerodynamics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dhruv%20Mehta">Dhruv Mehta</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexander%20van%20Zuijlen"> Alexander van Zuijlen</a>, <a href="https://publications.waset.org/abstracts/search?q=Hester%20Bijl"> Hester Bijl</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Large Eddy Simulation (LES) numerically resolves the large energy-containing eddies of a turbulent flow, while modelling the small dissipative eddies. On a wind farm, these large scales carry the energy wind turbines extracts and are also responsible for transporting the turbines’ wakes, which may interact with downstream turbines and certainly with the atmospheric boundary layer (ABL). In this situation, it is important to conserve the energy that these wake’s carry and which could be altered artificially through numerical dissipation brought about by the schemes used for the spatial discretisation and temporal integration. Numerical dissipation has been reported to cause the premature recovery of turbine wakes, leading to an over prediction in the power produced by wind farms.An energy-conserving scheme is free from numerical dissipation and ensures that the energy of the wakes is increased or decreased only by the action of molecular viscosity or the action of wind turbines (body forces). The aim is to create an LES package with energy-conserving schemes to simulate wind turbine wakes correctly to gain insight into power-production, wake meandering etc. Such knowledge will be useful in designing more efficient wind farms with minimal wake interaction, which if unchecked could lead to major losses in energy production per unit area of the wind farm. For their research, the authors intend to use the Energy-Conserving Navier-Stokes code developed by the Energy Research Centre of the Netherlands. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=energy-conserving%20schemes" title="energy-conserving schemes">energy-conserving schemes</a>, <a href="https://publications.waset.org/abstracts/search?q=modelling%20turbulence" title=" modelling turbulence"> modelling turbulence</a>, <a href="https://publications.waset.org/abstracts/search?q=Large%20Eddy%20Simulation" title=" Large Eddy Simulation"> Large Eddy Simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=atmospheric%20boundary%20layer" title=" atmospheric boundary layer"> atmospheric boundary layer</a> </p> <a href="https://publications.waset.org/abstracts/17675/large-eddy-simulation-with-energy-conserving-schemes-understanding-wind-farm-aerodynamics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17675.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">468</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">3830</span> Study on the Wave Dissipation Performance of Double-Cylinder and Double-Plate Floating Breakwater</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Liu%20Bijin">Liu Bijin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Floating breakwaters have several advantages, including being environmentally friendly, easy to construct, and cost-effective regardless of water depth. They have a broad range of applications in coastal engineering. However, they face significant challenges due to the unstable effect of wave dissipation, structural vulnerability, and high mooring system requirements. This paper investigates the wave dissipation performance of a floating breakwater structure. The structure consists of double cylinders, double vertical plates, and horizontal connecting plates. The investigation is carried out using physical model tests and numerical simulation methods based on STAR-CCM+. This paper discusses the impact of wave elements, relative vertical plate heights, and relative horizontal connecting plate widths on the wave dissipation performance of the double-cylinder, double-plate floating breakwater (DCDPFB). The study also analyses the changes in local vorticity and velocity fields around the DCDPFB to determine the optimal structural dimensions. The study found that the relative width of the horizontal connecting plate, the relative height of the vertical plate, and the size of the semi-cylinder are the key factors affecting the wave dissipation performance of the DCDPFB. The transmittance coefficient is minimally affected by the wave height and the depth of water entry. The local vortex and velocity field formed around the DCDPFB are important factors for dissipating wave energy. The test section of the DCDPFB, constructed according to the relative optimal structural dimensions, showed good wave dissipation performance during offshore prototype tests. The test section of DCDPFB, constructed with optimal structural dimensions, exhibits excellent wave dissipation performance in offshore prototype tests. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=floating%20breakwater" title="floating breakwater">floating breakwater</a>, <a href="https://publications.waset.org/abstracts/search?q=wave%20dissipation%20performance" title=" wave dissipation performance"> wave dissipation performance</a>, <a href="https://publications.waset.org/abstracts/search?q=transmittance%20coefficient" title=" transmittance coefficient"> transmittance coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=model%20test" title=" model test"> model test</a> </p> <a href="https://publications.waset.org/abstracts/185260/study-on-the-wave-dissipation-performance-of-double-cylinder-and-double-plate-floating-breakwater" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185260.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">61</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">3829</span> Influence of the Coarse-Graining Method on a DEM-CFD Simulation of a Pilot-Scale Gas Fluidized Bed</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Theo%20Ndereyimana">Theo Ndereyimana</a>, <a href="https://publications.waset.org/abstracts/search?q=Yann%20Dufresne"> Yann Dufresne</a>, <a href="https://publications.waset.org/abstracts/search?q=Micael%20Boulet"> Micael Boulet</a>, <a href="https://publications.waset.org/abstracts/search?q=Stephane%20Moreau"> Stephane Moreau</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The DEM (Discrete Element Method) is used a lot in the industry to simulate large-scale flows of particles; for instance, in a fluidized bed, it allows to predict of the trajectory of every particle. One of the main limits of the DEM is the computational time. The CGM (Coarse-Graining Method) has been developed to tackle this issue. The goal is to increase the size of the particle and, by this means, decrease the number of particles. The method leads to a reduction of the collision frequency due to the reduction of the number of particles. Multiple characteristics of the particle movement and the fluid flow - when there is a coupling between DEM and CFD (Computational Fluid Dynamics). The main characteristic that is impacted is the energy dissipation of the system, to regain the dissipation, an ADM (Additional Dissipative Mechanism) can be added to the model. The objective of this current work is to observe the influence of the choice of the ADM and the factor of coarse-graining on the numerical results. These results will be compared with experimental results of a fluidized bed and with a numerical model of the same fluidized bed without using the CGM. The numerical model is one of a 3D cylindrical fluidized bed with 9.6M Geldart B-type particles in a bubbling regime. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=additive%20dissipative%20mechanism" title="additive dissipative mechanism">additive dissipative mechanism</a>, <a href="https://publications.waset.org/abstracts/search?q=coarse-graining" title=" coarse-graining"> coarse-graining</a>, <a href="https://publications.waset.org/abstracts/search?q=discrete%20element%20method" title=" discrete element method"> discrete element method</a>, <a href="https://publications.waset.org/abstracts/search?q=fluidized%20bed" title=" fluidized bed"> fluidized bed</a> </p> <a href="https://publications.waset.org/abstracts/176694/influence-of-the-coarse-graining-method-on-a-dem-cfd-simulation-of-a-pilot-scale-gas-fluidized-bed" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/176694.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">3828</span> Seismic Performance of Highway Bridges with Partially Self-Centering Isolation Bearings against Near-Fault Ground Motions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shengxin%20Yu">Shengxin Yu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Earthquakes can cause varying degrees of damage to building and bridge structures. Traditional laminated natural rubber bearings (NRB) exhibit inadequate energy dissipation and restraint, particularly under near-fault ground motions, resulting in excessive displacements in the superstructure. This paper presents a composite natural rubber bearing (NFUD-NRB) incorporating two types of shape memory alloy (SMA) U-shaped dampers (UD). The bearing exhibits adjustable features, predominantly characterized by partial self-centering and multi-level energy dissipation, facilitated by nickel-titanium-based SMA (NiTi-SMA) and iron-based SMA (Fe-SMA) UDs. The hysteresis characteristics of NFUD-NRB can be tailored by manipulating the configuration of NiTi-SMA and Fe-SMA UDs. Firstly, the proposed bearing's geometric configuration and working principle are introduced. The rationality of the modeling strategy for the bearing is validated through existing experimental results. Parameterized numerical simulations are subsequently performed to investigate the partially self-centering behavior of NFUD-NRB. The findings indicate that NFUD-NRB can attain the anticipated nonlinear behavior and deliver adequate energy dissipation. Finally, the impact of NFUD-NRB on improving the seismic resilience of highway bridges is examined using the OpenSees software, with particular emphasis on the seismic performance of NFUD-NRB under near-fault ground motions. System-level analysis reveals that bridge systems equipped with NFUD-NRBs exhibit satisfactory residual deformations and higher energy dissipation than those equipped with traditional NRBs. Moreover, NFUD-NRB markedly mitigates the detrimental impacts of near-fault ground motions on the main structure of bridges. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=partially%20self-centering%20behavior" title="partially self-centering behavior">partially self-centering behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20dissipation" title=" energy dissipation"> energy dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20rubber%20bearing" title=" natural rubber bearing"> natural rubber bearing</a>, <a href="https://publications.waset.org/abstracts/search?q=shape%20memory%20alloy" title=" shape memory alloy"> shape memory alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=U-shaped%20damper" title=" U-shaped damper"> U-shaped damper</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20investigation" title=" numerical investigation"> numerical investigation</a>, <a href="https://publications.waset.org/abstracts/search?q=near-fault%20ground%20motion" title=" near-fault ground motion"> near-fault ground motion</a> </p> <a href="https://publications.waset.org/abstracts/184070/seismic-performance-of-highway-bridges-with-partially-self-centering-isolation-bearings-against-near-fault-ground-motions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/184070.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">61</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">3827</span> Dissipation of Tebuconazole in Cropland Soils as Affected by Soil Factors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bipul%20Behari%20Saha">Bipul Behari Saha</a>, <a href="https://publications.waset.org/abstracts/search?q=Sunil%20Kumar%20Singh"> Sunil Kumar Singh</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Padmaja"> P. Padmaja</a>, <a href="https://publications.waset.org/abstracts/search?q=Kamlesh%20Vishwakarma"> Kamlesh Vishwakarma</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dissipation study of tebuconazole in alluvial, black and deep-black clayey soils collected from paddy, mango and peanut cropland of tropical agro-climatic zone of India at three concentration levels were carried out for monitoring the water contamination through persisted residual toxicity. The soil-slurry samples were analyzed by capillary GC-NPD methods followed by ultrasound-assisted extraction (UAE) technique and cleanup process. An excellent linear relationship between peak area and concentration obtained in the range 1 to 50 μgkg-1. The detection (S/N, 3 ± 0.5) and quantification (S/N, 7.5 ± 2.5) limits were 3 and 10 μgkg-1 respectively. Well spiked recoveries were achieved from 96.28 to 99.33 % at levels 5 and 20 μgkg-1 and method precision (% RSD) was ≤ 5%. The soils dissipation of tebuconazole was fitted in first order kinetic-model with half-life between 34.48 to 48.13 days. The soil organic-carbon (SOC) content correlated well with the dissipation rate constants (DRC) of the fungicide Tebuconazole. An increase in the SOC content resulted in faster dissipation. The results indicate that the soil organic carbon and tebuconazole concentrations plays dominant role in dissipation processes. The initial concentration illustrated that the degradation rate of tebuconazole in soils was concentration dependent. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cropland%20soil" title="cropland soil">cropland soil</a>, <a href="https://publications.waset.org/abstracts/search?q=dissipation" title=" dissipation"> dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=laboratory%20incubation" title=" laboratory incubation"> laboratory incubation</a>, <a href="https://publications.waset.org/abstracts/search?q=tebuconazole" title=" tebuconazole"> tebuconazole</a> </p> <a href="https://publications.waset.org/abstracts/51929/dissipation-of-tebuconazole-in-cropland-soils-as-affected-by-soil-factors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/51929.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">255</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">3826</span> Improvement of Heat Dissipation Ability of Polyimide Composite Film</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jinyoung%20Kim">Jinyoung Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Jinuk%20Kwon"> Jinuk Kwon</a>, <a href="https://publications.waset.org/abstracts/search?q=Haksoo%20Han"> Haksoo Han</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Polyimide is widely used in electronic industries, and heat dissipation of polyimide film is important for its application in electric devices for high-temperature resistance heat dissipation film. In this study, we demonstrated a new way to increase heat dissipating rate by adding carbon black as filler. This type of polyimide composite film was produced by pyromellitic dianhydride (PMDA) and 4,4’-oxydianiline (ODA). Carbon black (CB) is added in different loading, shows increasing heat dissipation rate for increase of Carbon black. The polyimide-carbon black composite film is synthesized with high dissipation rate to ~8W∙m−1K−1. Its high thermal decomposition temperature and glass transition temperature were maintained with carbon filler verified by thermogravimetric analysis (TGA) and differential scanning calorimetric (DSC), the polyimidization reaction of polyi(amide-mide) was confirmed by Fourier transform infrared spectroscopy (FT-IR). The polyimide composite film with carbon black with high heat dissipating rate could be used in various applications such as computers, mobile phone industries, integrated circuits, coating materials, semiconductor etc. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=polyimide" title="polyimide">polyimide</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20dissipation" title=" heat dissipation"> heat dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=electric%20device" title=" electric device"> electric device</a>, <a href="https://publications.waset.org/abstracts/search?q=filler" title=" filler"> filler</a> </p> <a href="https://publications.waset.org/abstracts/23358/improvement-of-heat-dissipation-ability-of-polyimide-composite-film" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23358.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">683</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">3825</span> Heat and Mass Transfer in MHD Flow of Nanofluids through a Porous Media Due to a Permeable Stretching Sheet with Viscous Dissipation and Chemical Reaction Effects</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yohannes%20Yirga">Yohannes Yirga</a>, <a href="https://publications.waset.org/abstracts/search?q=Daniel%20Tesfay"> Daniel Tesfay</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The convective heat and mass transfer in nanofluid flow through a porous media due to a permeable stretching sheet with magnetic field, viscous dissipation, and chemical reaction and Soret effects are numerically investigated. Two types of nanofluids, namely Cu-water and Ag-water were studied. The governing boundary layer equations are formulated and reduced to a set of ordinary differential equations using similarity transformations and then solved numerically using the Keller box method. Numerical results are obtained for the skin friction coefficient, Nusselt number and Sherwood number as well as for the velocity, temperature and concentration profiles for selected values of the governing parameters. Excellent validation of the present numerical results has been achieved with the earlier linearly stretching sheet problems in the literature. <p class="card-text"><strong>Keywords:</strong> <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=magnetohydrodynamics" title=" magnetohydrodynamics"> magnetohydrodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofluid" title=" nanofluid"> nanofluid</a>, <a href="https://publications.waset.org/abstracts/search?q=fluid%20dynamics" title=" fluid dynamics"> fluid dynamics</a> </p> <a href="https://publications.waset.org/abstracts/4910/heat-and-mass-transfer-in-mhd-flow-of-nanofluids-through-a-porous-media-due-to-a-permeable-stretching-sheet-with-viscous-dissipation-and-chemical-reaction-effects" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4910.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">295</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">3824</span> Study of the Relationship between the Roughness Configuration of Channel Bottom and the Creation of Vortices at the Rough Area: Numerical Modelling </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Youb%20Said">Youb Said</a>, <a href="https://publications.waset.org/abstracts/search?q=Fourar%20Ali"> Fourar Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> To describe the influence of bottom roughness on the free surface flows by numerical modeling, a two-dimensional model was developed. The equations of continuity and momentum (Naviers Stokes equations) are solved by the finite volume method. We considered a turbulent flow in an open channel with a bottom roughness. For our simulations, the K-ε model was used. After setting the initial and boundary conditions and solve the equations set, we were able to achieve the following results: vortex forming in the hollow causing substantial energy dissipation in the obstacle areas that form the bottom roughness. The comparison of our results with experimental ones shows a good agreement in terms of the results in the rough area. However, in other areas, differences were more or less important. These differences are in areas far from the bottom, especially the free surface area just after the bottom. These disagreements are probably due to experimental constants used by the k-ε model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=modeling" title="modeling">modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20surface%20flow" title=" free surface flow"> free surface flow</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulence" title=" turbulence"> turbulence</a>, <a href="https://publications.waset.org/abstracts/search?q=bottom%20roughness" title=" bottom roughness"> bottom roughness</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20volume" title=" finite volume"> finite volume</a>, <a href="https://publications.waset.org/abstracts/search?q=K-%CE%B5%20model" title=" K-ε model"> K-ε model</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20dissipation" title=" energy dissipation"> energy dissipation</a> </p> <a href="https://publications.waset.org/abstracts/19829/study-of-the-relationship-between-the-roughness-configuration-of-channel-bottom-and-the-creation-of-vortices-at-the-rough-area-numerical-modelling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19829.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">382</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">3823</span> Study of Energy Dissipation in Shape Memory Alloys: A Comparison between Austenite and Martensite Phase of SMAs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amirmozafar%20Benshams">Amirmozafar Benshams</a>, <a href="https://publications.waset.org/abstracts/search?q=Khatere%20Kashmari"> Khatere Kashmari</a>, <a href="https://publications.waset.org/abstracts/search?q=Farzad%20Hatami"> Farzad Hatami</a>, <a href="https://publications.waset.org/abstracts/search?q=Mesbah%20Saybani"> Mesbah Saybani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Shape memory alloys with high capability of energy dissipation and large deformation bearing with return ability to their original shape without too much hysteresis strain have opened their place among the other damping systems as smart materials. Ninitol which is the most well-known and most used alloy material from the shape memory alloys family, has high resistance and fatigue and is coverage for large deformations. Shape memory effect and super-elasticity by shape alloys like Nitinol, are the reasons of the high power of these materials in energy depreciation. Thus, these materials are suitable for use in reciprocating dynamic loading conditions. The experiments results showed that Nitinol wires with small diameter have greater energy dissipation capability and by increase of diameter and thickness the damping capability and energy dissipation increase. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=shape%20memory%20alloys" title="shape memory alloys">shape memory alloys</a>, <a href="https://publications.waset.org/abstracts/search?q=shape%20memory%20effect" title=" shape memory effect"> shape memory effect</a>, <a href="https://publications.waset.org/abstracts/search?q=super%20elastic%20effect" title=" super elastic effect"> super elastic effect</a>, <a href="https://publications.waset.org/abstracts/search?q=nitinol" title=" nitinol"> nitinol</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20dissipation" title=" energy dissipation"> energy dissipation</a> </p> <a href="https://publications.waset.org/abstracts/55075/study-of-energy-dissipation-in-shape-memory-alloys-a-comparison-between-austenite-and-martensite-phase-of-smas" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55075.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">524</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">3822</span> Numerical Investigation of Wave Interaction with Double Vertical Slotted Walls</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Ahmed">H. Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Schlenkhoff"> A. Schlenkhoff</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recently, permeable breakwaters have been suggested to overcome the disadvantages of fully protection breakwaters. These protection structures have minor impacts on the coastal environment and neighboring beaches where they provide a more economical protection from waves and currents. For regular waves, a numerical model is used (FLOW-3D, VOF) to investigate the hydraulic performance of a permeable breakwater. The model of permeable breakwater consists of a pair of identical vertical slotted walls with an impermeable upper and lower part, where the draft is a decimal multiple of the total depth. The middle part is permeable with a porosity of 50%. The second barrier is located at distant of 0.5 and 1.5 of the water depth from the first one. The numerical model is validated by comparisons with previous laboratory data and semi-analytical results of the same model. A good agreement between the numerical results and both laboratory data and semi-analytical results has been shown and the results indicate the applicability of the numerical model to reproduce most of the important features of the interaction. Through the numerical investigation, the friction factor of the model is carefully discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coastal%20structures" title="coastal structures">coastal structures</a>, <a href="https://publications.waset.org/abstracts/search?q=permeable%20breakwater" title=" permeable breakwater"> permeable breakwater</a>, <a href="https://publications.waset.org/abstracts/search?q=slotted%20wall" title=" slotted wall"> slotted wall</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20model" title=" numerical model"> numerical model</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20dissipation%20coefficient" title=" energy dissipation coefficient"> energy dissipation coefficient</a> </p> <a href="https://publications.waset.org/abstracts/12807/numerical-investigation-of-wave-interaction-with-double-vertical-slotted-walls" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12807.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">397</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">3821</span> Influence of Insulation System Methods on Dissipation Factor and Voltage Endurance</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Farzad%20Yavari">Farzad Yavari</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamid%20Chegini"> Hamid Chegini</a>, <a href="https://publications.waset.org/abstracts/search?q=Saeed%20Lotfi"> Saeed Lotfi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper reviews the comparison of Resin Rich (RR) and Vacuum Pressure Impregnation (VPI) insulation system qualities for stator bar of rotating electrical machines. Voltage endurance and tangent delta are two diagnostic tests to determine the quality of insulation systems. The paper describes the trend of dissipation factor while performing voltage endurance test for different stator bar samples made with RR and VPI insulation system methods. Some samples were made with the same strands and insulation thickness but with different main wall material to prove the influence of insulation system methods on stator bar quality. Also, some of the samples were subjected to voltage at the temperature of their insulation class, and their dissipation factor changes were measured and studied. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=VPI" title="VPI">VPI</a>, <a href="https://publications.waset.org/abstracts/search?q=resin%20rich" title=" resin rich"> resin rich</a>, <a href="https://publications.waset.org/abstracts/search?q=insulation" title=" insulation"> insulation</a>, <a href="https://publications.waset.org/abstracts/search?q=stator%20bar" title=" stator bar"> stator bar</a>, <a href="https://publications.waset.org/abstracts/search?q=dissipation%20factor" title=" dissipation factor"> dissipation factor</a>, <a href="https://publications.waset.org/abstracts/search?q=voltage%20endurance" title=" voltage endurance"> voltage endurance</a> </p> <a href="https://publications.waset.org/abstracts/104741/influence-of-insulation-system-methods-on-dissipation-factor-and-voltage-endurance" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/104741.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">207</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">3820</span> Three-Dimensional Numerical Investigation for Reinforced Concrete Slabs with Opening </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelrahman%20Elsehsah">Abdelrahman Elsehsah</a>, <a href="https://publications.waset.org/abstracts/search?q=Hany%20Madkour"> Hany Madkour</a>, <a href="https://publications.waset.org/abstracts/search?q=Khalid%20Farah"> Khalid Farah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article presents a 3-D modified non-linear elastic model in the strain space. The Helmholtz free energy function is introduced with the existence of a dissipation potential surface in the space of thermodynamic conjugate forces. The constitutive equation and the damage evolution were derived as well. The modified damage has been examined to model the nonlinear behavior of reinforced concrete (RC) slabs with an opening. A parametric study with RC was carried out to investigate the impact of different factors on the behavior of RC slabs. These factors are the opening area, the opening shape, the place of opening, and the thickness of the slabs. And the numerical results have been compared with the experimental data from literature. Finally, the model showed its ability to be applied to the structural analysis of RC slabs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=damage%20mechanics" title="damage mechanics">damage mechanics</a>, <a href="https://publications.waset.org/abstracts/search?q=3-D%20numerical%20analysis" title=" 3-D numerical analysis"> 3-D numerical analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=RC" title=" RC"> RC</a>, <a href="https://publications.waset.org/abstracts/search?q=slab%20with%20opening" title=" slab with opening"> slab with opening</a> </p> <a href="https://publications.waset.org/abstracts/97463/three-dimensional-numerical-investigation-for-reinforced-concrete-slabs-with-opening" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97463.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">179</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">3819</span> Numerical Analysis of Prefabricated Horizontal Drain Induced Consolidation Using ABAQUS</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anjana%20R.%20Menon">Anjana R. Menon</a>, <a href="https://publications.waset.org/abstracts/search?q=Anjana%20Bhasi"> Anjana Bhasi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper deals with the numerical analysis of Prefabricated Horizontal Drain (PHD) induced consolidation of clayey deposits, using ABAQUS. PHDs are much like Prefabricated Vertical Drains (PVDs) installed in horizontal layers, used mainly for enhancing the consolidation of clayey fill embankments, and dredged mud deposits. The efficiency of the system depends mainly on the spacing and layout of the drain. Hence, two spacing related parameters are defined, namely WH (width to horizontal spacing ratio) and VH (vertical to horizontal spacing ratio), and the finite element models are developed based on plane strain unit cell conditions under various combinations of these parameters. The analysis results, in terms of degree of consolidation (U), are compared with the established theories. Based on the analysis, a set of equations are proposed to analyse the PHD induced consolidation. The proposed method is found to be reasonably accurate. Further, the effect of PHDs at different spacing ratios, in accelerating consolidation of a clayey embankment fill is analysed in terms of pore pressure dissipation rate, and settlement. The PHD is found to accelerate the rate of pore pressure dissipation by more than 50%, thus reducing the time for final settlement significantly. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ABAQUS" title="ABAQUS">ABAQUS</a>, <a href="https://publications.waset.org/abstracts/search?q=consolidation" title=" consolidation"> consolidation</a>, <a href="https://publications.waset.org/abstracts/search?q=plane%20strain" title=" plane strain"> plane strain</a>, <a href="https://publications.waset.org/abstracts/search?q=prefabricated%20horizontal%20drain" title=" prefabricated horizontal drain"> prefabricated horizontal drain</a> </p> <a href="https://publications.waset.org/abstracts/67741/numerical-analysis-of-prefabricated-horizontal-drain-induced-consolidation-using-abaqus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/67741.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">366</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">3818</span> Heat Transfer Enhancement through Hybrid Metallic Nanofluids Flow with Viscous Dissipation and Joule Heating Effect</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khawar%20Ali">Khawar Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We present the numerical study of unsteady hydromagnetic (MHD) ﬂow and heat transfer characteristics of a viscous incompressible electrically conducting water-based hybrid metallic nanoﬂuid (containing Cu-Au/ H₂O nanoparticles) between two orthogonally moving porous coaxial disks with suction. Diﬀerent from the classical shooting methodology, we employ a combination of a direct and an iterative method (SOR with optimal relaxation parameter) for solving the sparse systems of linear algebraic equations arising from the FD discretization of the linearized self similar nonlinear ODEs. Eﬀects of the governing parameters on the ﬂow and heat transfer are discussed and presented through tables and graphs. The ﬁndings of the present investigation may be beneﬁcial for the electronic industry in maintaining the electronic components under eﬀectiveand safe operational conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer%20enhancement" title="heat transfer enhancement">heat transfer enhancement</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20metallic%20nanofluid" title=" hybrid metallic nanofluid"> hybrid metallic nanofluid</a>, <a href="https://publications.waset.org/abstracts/search?q=viscous%20dissipation%20%20and%20joule%20heating%20effect" title=" viscous dissipation and joule heating effect "> viscous dissipation and joule heating effect </a>, <a href="https://publications.waset.org/abstracts/search?q=Two%20dimensional%20flow" title=" Two dimensional flow"> Two dimensional flow</a> </p> <a href="https://publications.waset.org/abstracts/129944/heat-transfer-enhancement-through-hybrid-metallic-nanofluids-flow-with-viscous-dissipation-and-joule-heating-effect" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/129944.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">3817</span> Dissipation Capacity of Steel Building with Fiction Pendulum Base-Isolation System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Ras">A. Ras</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Nait%20Zerrad"> I. Nait Zerrad</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Benmouna"> N. Benmouna</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Boumechra"> N. Boumechra</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Use of base isolators in the seismic design of structures has attracted considerable attention in recent years. The major concern in the design of these structures is to have enough lateral stability to resist wind and seismic forces. There are different systems providing such isolation, among them there are friction- pendulum base isolation systems (FPS) which are rather widely applied nowadays involving to both affordable cost and high fundamental periods. These devices are characterised by a stiff resistance against wind loads and to be flexible to the seismic tremors, which make them suitable for different situations. In this paper, a 3D numerical investigation is done considering the seismic response of a twelve-storey steel building retrofitted with a FPS. Fast nonlinear time history analysis (FNA) of Boumerdes earthquake (Algeria, May 2003) is considered for analysis and carried out using SAP2000 software. Comparisons between fixed base, bearing base isolated and braced structures are shown in a tabulated and graphical format. The results of the various alternatives studies to compare the structural response without and with this device of dissipation energy thus obtained were discussed and the conclusions showed the interesting potential of the FPS isolator. This system may to improve the dissipative capacities of the structure without increasing its rigidity in a significant way which contributes to optimize the quantity of steel necessary for its general stability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=energy%20dissipation" title="energy dissipation">energy dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=friction-pendulum%20system" title=" friction-pendulum system"> friction-pendulum system</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20analysis" title=" nonlinear analysis"> nonlinear analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=steel%20structure" title=" steel structure"> steel structure</a> </p> <a href="https://publications.waset.org/abstracts/54047/dissipation-capacity-of-steel-building-with-fiction-pendulum-base-isolation-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54047.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">203</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">3816</span> Effect of Viscous Dissipation and Axial Conduction in Thermally Developing Region of the Channel Partially Filled with a Porous Material Subjected to Constant Wall Heat Flux</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=D%20Bhargavi">D Bhargavi</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Sharath%20Kumar%20Reddy"> J. Sharath Kumar Reddy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present investigation has been undertaken to assess the effect of viscous dissipation and axial conduction on forced convection heat transfer in the entrance region of a parallel plate channel with the porous insert attached to both walls of the channel. The flow field is unidirectional. Flow in the porous region corresponds to Darcy-Brinkman model and the clear fluid region to that of plane Poiseuille flow. The effects of the parameters Darcy number, <em>Da</em>, Peclet number, <em>Pe</em>, Brinkman number, <em>Br</em> and a porous fraction <em>γ<sub>p</sub></em> on the local heat transfer coefficient are analyzed graphically. Effects of viscous dissipation employing the Darcy model and the clear fluid compatible model have been studied. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=porous%20material" title="porous material">porous material</a>, <a href="https://publications.waset.org/abstracts/search?q=channel%20partially%20filled%20with%20a%20porous%20material" title=" channel partially filled with a porous material"> channel partially filled with a porous material</a>, <a href="https://publications.waset.org/abstracts/search?q=axial%20conduction" title=" axial conduction"> axial conduction</a>, <a href="https://publications.waset.org/abstracts/search?q=viscous%20dissipation" title=" viscous dissipation"> viscous dissipation</a> </p> <a href="https://publications.waset.org/abstracts/114671/effect-of-viscous-dissipation-and-axial-conduction-in-thermally-developing-region-of-the-channel-partially-filled-with-a-porous-material-subjected-to-constant-wall-heat-flux" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/114671.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">168</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=numerical%20dissipation&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=numerical%20dissipation&page=3">3</a></li> <li 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