在热辐射、粘性耗散和焦耳加热作用下,纳米埃林-鲍威尔流体通过对流加热拉伸片的非定常三维MHD流动

B. Mahanthesh , B.J. Gireesha , Rama Subba Reddy Gorla
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引用次数: 98

摘要

本研究的目的是研究由拉伸表面引起的非定常磁流体力学三维流动。在纳米颗粒的存在下,一种不可压缩的导电埃灵-鲍威尔流体填充了对流加热的拉伸表面。在传热方程中考虑了热辐射、粘性耗散和焦耳加热的影响。用于纳米流体的模型包括布朗运动和热泳的影响。利用相似度法将高度非线性的偏微分方程化为常微分方程。采用带射击技术的龙格-库塔-费贝格45法对简化的复杂两点边值问题进行了数值处理。文中还将所得的数值结果与已有的极限结果进行了比较。最后讨论了影响参数对速度场、温度场和纳米粒子浓度场的影响。此外,还计算了工程物理量,如努塞尔数和舍伍德数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Unsteady three-dimensional MHD flow of a nano Eyring-Powell fluid past a convectively heated stretching sheet in the presence of thermal radiation, viscous dissipation and Joule heating

The purpose of this study is to investigate the unsteady magnetohydrodynamic three-dimensional flow induced by a stretching surface. An incompressible electrically conducting Eyring-Powell fluid fills the convectively heated stretching surface in the presence of nanoparticles. The effects of thermal radiation, viscous dissipation and Joule heating are accounted in heat transfer equation. The model used for the nanofluid includes the effects of Brownian motion and thermophoresis. The highly nonlinear partial differential equations are reduced to ordinary differential equations with the help of similarity method. The reduced complicated two-point boundary value problem is treated numerically using Runge–Kutta–Fehlberg 45 method with shooting technique. A comparison of the obtained numerical results with existing results in a limiting sense is also presented. At the end, the effects of influential parameters on velocity, temperature and nanoparticles concentration fields are also discussed comprehensively. Further, the physical quantities of engineering interest such as the Nusselt number and Sherwood number are also calculated.

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