Analysis of magnetohydrodynamics (MHD) natural convection in 2D cavity and 3D cavity with thermal radiation effects
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论文类型：期刊论文
发表时间：2017-09-01
发表刊物：INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
收录刊物：SCIE、EI、Scopus
卷号：112
页面范围：216-223
ISSN号：0017-9310
关键字：Thermal radiation; MHD natural convection; 2D cavity and 3D cavity; Spectral collocation method-artificial; compressibility method
摘要：In this work, the thermal radiation effects on magnetohydrodynamics (MHD) natural convection in 2D cavity and 3D cavity are investigated numerically with different Plank number PI and Hartmann number Ha. The radiative flux is obtained by solving radiative transfer equation (RTE) instead of widely used approximation methods. A combined method SCM-ACM (spectral collocation method-artificial compressibility method) is developed to solve the N-S equations. Comparative analysis of thermal radiation effects on MHD flow and heat transfer in 2D cavity and 3D cavity is conducted with same parameters. The results show that the thermal radiation strengthens the flow and heat transfer on the spanwise direction in 3D cavity, while the magnetic field plays opposite effects. The differences on flow and temperature distribution between 2D cavity and 3D cavity (on the middle XY-plane in the spanwise direction) are remarkable for high level thermal radiation and weak magnetic flied, and become smaller for weaker thermal radiation and stronger magnetic flied. (C) 2017 Elsevier Ltd. All rights reserved.
发表时间：2017-09-01