流体饱和多孔介质中热发展强迫对流的熵产分析

K·霍曼; A·伊济拉利; F·霍曼

流体饱和多孔介质中热发展强迫对流的熵产分析

昆士兰大学工程学院,布里斯班,澳大利亚;2.纳马瓦让德尔瓦工程和结构公司,德黑兰,伊朗;3.夏瑞夫工业大学化学工程系,德黑兰,伊朗

详细信息

中图分类号: O357.3
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出版历程
- 收稿日期: 2007-08-01
- 修回日期: 2008-01-07
- 刊出日期: 2008-02-15

Entropy Generation Analysis of Thermally Developing Forced Convection in a Fluid-Saturated Porous Medium

School of Engineering, The University of Queensland, Brisbane, Australia;

摘要

摘要: 利用Darcy流动模型，同时考虑粘性耗散效应，分析研究了以两等温平板为边界的多孔介质中，热发展强迫对流的熵产．参数研究表明，组参数和Péclet数减小，而Brinkman数增大时，熵产增大．形象化的热线表示方法着重应用于Br＜0的情况，在这种情况下，在顺流的某些位置上，存在热传递方向的改变，即从原来的壁面向外传热变为向壁面传热．
- 熵产 /
- 多孔介质 /
- 热线 /
- 能通量矢量 /
- 强迫对流
Abstract: Entropy generation for thermally developing forced convection in a porous medium bounded by two isothermal parallel plates was investigated analytically on the basis of the Darcy flow model where the viscous dissipation effects had also been taken into account.A parametric study showed that decreasing the group parameter and the P clet number increases the entropy generation while for the Brinkman number the converse is true.Heatline visualization technique is applied with an emphasis on Br is less than 0 case where there is somewhere that heat transfer changes direction at some streamwise location to the wall instead of its original direction,i.e.from the wall.
- entropy generation /
- porous media /
- heatline /
- energy flux vectors /
- forced convection

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参考文献(23)

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