磁微极流体流过具有可变热物性的倾斜非线性拉伸片的对流换热分析

E. Fatunmbi, S. Okoya, O. Makinde
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引用次数: 13

摘要

本文研究了磁微极流体经过沿流动方向非线性拉伸的加热倾斜薄片时的混合对流边界层流动和传热特性。考察了流体热物理特性的变化以及磁场、热辐射和粘性耗散对流场的影响。通过相似变换将所建立的控制方程由偏微分方程转化为常微分方程,并结合龙格-库塔积分算法对所得到的方程进行数值求解。通过不同的图形说明了表面摩擦系数、努塞尔数、无量纲速度和温度对新出现的控制参数变化的反应。在有限的情况下,所得结果与文献中已有的相关作品表现出很强的关联性。研究结果还表明,随着埃克特数和比奥数参数的增加,热边界层的厚度也会大幅增加,而增加材料(微极性)和导热系数参数对换热速率的影响则相反。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Convective Heat Transfer Analysis of Hydromagnetic Micropolar Fluid Flow Past an Inclined Nonlinear Stretching Sheet with Variable Thermo-Physical Properties
The current work examines mixed convection boundary layer flow and heat transfer attributes in hydromagnetic micropolar fluid past a heated inclined sheet which stretches nonlinearly along the direction of flow. The impact of variable thermo-physical characteristics of the fluid together with the influence of magnetic field, thermal radiation and viscous dissipation are also checked on the flow field. The modelled governing equations are translated from partial to ordinary differential equations via relevant similarity transformations and the resulting equations are subsequently solved numerically by means of shooting techniques in company with Runge-Kutta integration algorithms. The reactions of the skin friction coefficient, Nusselt number, dimensionless velocity as well as temperature to variations in the emerging controlling parameters are illustrated through different graphs. In the limiting situations, the results obtained exhibit a strong relationship with the existing related works in literature. The facts emanated from this study also reveal that the thickness of the thermal boundary layer grows widely with a rise in the Eckert number and Biot number parameters whereas increasing the material (micropolar) and thermal conductivity parameters have opposite effects on the rate of heat transfer.
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