Double dispersion effects on natural convection heat and mass transfer in non-Darcy porous medium
Double dispersion effects on natural convection heat and mass transfer in non-Darcy porous medium
复制标题
DOI：
10.1016/j.amc.2003.07.001
复制
发表时间：
2004-08-25
影响因子：
4
通讯作者：
El-Amin, MF
中科院分区：
文献类型：
--
作者：
El-Amin, MF
研究了多孔介质中垂直表面非达西自由对流换热传质过程中的流体动力弥散问题。流动方程中考虑了Forchheimer延拓。达西和非达西多孔介质中的流动、温度和浓度场受扩散速率Le、浮力比N和参数Gamma、Zeta、F-0、Ra-d之间的复杂相互作用所控制。给出了速度分布、温度分布和浓度分布的数值结果。讨论了达西和非达西两种情况下的热弥散和溶质扩散系数对表格中所输入的热传递速率的综合影响。(C)2003 Elsevier Inc.保留所有权利。
The problem of hydrodynamic dispersion in non-Darcy free convection heat and mass transfer from vertical surface embedded in a porous medium has been presented. The Forchheimer extension is considered in the flow equations. The flow, temperature and concentration fields in Darcy and non-Darcy porous media are observed to be governed by complex interactions among the diffusion rate Le, buoyancy ratio N, and the parameters gamma, zeta, F-0, Ra-d. Numerical results for the details of the velocity, temperature and concentration profiles which are shown on graphs have been presented. The combined effect of thermal dispersion and solutal diffusivity, for the two cases Darcy and non-Darcy porous medium, on the heat transfer rate which are entered in tables is discussed. (C) 2003 Elsevier Inc. All rights reserved.