Free convection in a partially heated wavy porous cavity filled with a nanofluid under the effects of Brownian diffusion and thermophoresis
Free convection in a partially heated wavy porous cavity filled with a nanofluid under the effects of Brownian diffusion and thermophoresis
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DOI：
10.1016/j.applthermaleng.2016.11.033
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发表时间：
2017-02
影响因子：
6.4
通讯作者：
M. Sheremet;D. Cîmpean;I. Pop
中科院分区：
文献类型：
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作者：
M. Sheremet;D. Cîmpean;I. Pop
对填充纳米流体的多孔波状腔内的自然对流换热和流体流动进行了数值分析。感兴趣的领域是一个带有左侧等温波浪壁的方形空腔，而其他壁是平坦的。恒温热源位于右侧垂直壁上。使用达西-布辛涅斯克近似的无量纲变量制定的控制方程已在二阶精度的有限差分法的基础上求解。包括布朗扩散和热泳效应的两相纳米流体模型已用于模拟腔内纳米流体的传输。对瑞利数、波动数和热源尺寸进行了广泛的分析。研究发现，局部热源对纳米流体的流动和传热速率具有有效的影响。
Numerical analysis of natural convective heat transfer and fluid flow inside a porous wavy cavity filled with a nanofluid has been carried out. The domain of interest is a square cavity with a left isothermal wavy wall, while other walls are flat. A heat source of constant temperature is located on the right vertical wall. Governing equations formulated in terms of the dimensionless variables using the Darcy–Boussinesq approximation have been solved on the basis of finite difference method of the second order accuracy. The two-phase nanofluid model including the Brownian diffusion and thermophoresis effects has been used for simulation of nanofluid transport inside the cavity. Analysis has been conducted in a wide range of the Rayleigh number, undulation number and heat source size. It has been found that the local heat source has an efficient influence of the nanofluid flow and heat transfer rate.