urans湍流闭合模型在电磁和其他体力作用下的复杂流动中的应用

Proceeding of Eighth International Symposium on Turbulence and Shear Flow Phenomena Pub Date : 2013-08-01 DOI:10.1615/tsfp8.1230

Dean Wilson, T. Craft, H. Iacovides

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摘要

本文研究了非定常reynolds平均Navier-Stokes (URANS)方法在两类电磁影响湍流中的应用。第一种是施加壁法向磁场的周期性二维通道流(哈特曼流)，第二种是施加垂直磁场的瑞利-贝纳德对流。湍流用一个低re的k ?e模型表示，该模型在Kenjere?s & Hanjali(2000)。结果表明，随着磁场强度的增加，修正导致瑞利-贝纳德对流中相干结构的戏剧性重组，但在简单通道流中，修正过高地预测了湍流剪切应力的阻尼。

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APPLICATION OF URANS TURBULENCE CLOSURE MODELS TO COMPLEX FLOWS SUBJECTED TO ELECTROMAGNETIC AND OTHER BODY FORCES

This paper considers the application of the UnsteadyReynolds Averaged Navier-Stokes (URANS) approach totwo types of electromagnetically influenced turbulent flows.The first is a periodic 2D channel flow with an imposedwall normal magnetic field (Hartmann flow) and the second is that of Rayleigh-B�enard convection with a vertical magnetic field imposed. The turbulence is represented by a low-Re k ?e model which is tested with and without electromagnetic modifications proposed by Kenjere?s & Hanjali�c (2000). The results show the modifications lead to a dramatic reorganisation of the coherent structures in Rayleigh-B�enard convection as the magnetic field strength is increased, but over-predict the damping of the turbulent shear stress in a simple channel flow.

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Proceeding of Eighth International Symposium on Turbulence and Shear Flow Phenomena

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