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首页> 外文会议>BSME International Conference on Thermal Engineering >MHD Mixed Convection Analysis of Non-Newtonian Power Law Fluid in an Open Channel with Round Cavity
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MHD Mixed Convection Analysis of Non-Newtonian Power Law Fluid in an Open Channel with Round Cavity

机译：圆形腔内开放通道中非牛顿电力法流体的MHD混合对流分析

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摘要

In this study, magneto-hydrodynamic (MHD) mixed convection flow through a channel with a round cavity at bottom wall using non-Newtonian power law fluid is analysed numerically. The cavity is kept at uniformly high temperature whereas rest of the bottom wall is insulated and top wall of the channel is maintained at a temperature lower than cavity temperature. Grid independency test and code validation are performed to justify the computational accuracy before solving the present problem. Galerkin weighted residual method is appointed to solve the continuity, momentum and energy equations. The problem is solved for wide range of pertinent parameters like Rayleigh number (Ra= 10~3 - 10~5), Hartmann number (Ha= 0 - 60) and power law index (n= 0.5 - 1.5) at constant Richardson number Ri= 1.0. The flow and thermal field have been thoroughly discussed through streamline and isothermal lines respectively. The heat transfer performance of the given study is illustrated by average Nusselt number plots. Result of this investigation indicates that heat transfer is highest for dilatant fluids at this configuration and they perform better (47% more heat transfer) in absence of magnetic field. The retardation of heat transfer is offset by shear thickening nature of non-Newtonian fluid.
机译：在本研究中，在数值上分析了使用非牛顿电力法流体的底壁的圆形腔的磁动力学（MHD）混合对流流。腔体保持在均匀高温，而底壁的剩余部分是绝缘的，并且通道的顶壁保持在低于腔温度的温度。在解决当前问题之前，执行网格独立性测试和代码验证以证明计算准确性。 Galerkin加权残留方法被指定解决连续性，动量和能量方程。在径向Richardson Number RI恒定的RADLEIGH（RA = 10〜3 - 10〜5），HARTMANN NUMBER（HA = 0 - 60）和电力法指数（n = 0.5 - 1.5）等各种相关参数，解决问题= 1.0。通过流线和等温线彻底讨论了流动和热场。给定研究的传热性能是通过平均露天局部图说明的。该研究的结果表明，在这种配置的膨胀液中，热传递最高，并且它们在没有磁场的情况下执行更好的（传热47％的传热）。通过剪切增稠性质的非牛顿流体的剪切增厚性质抵消了传热的延迟。

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