非均匀内热源对多孔介质内复合对流传热传质的数值研究  

Numerical analysis of heat and mass transfer in porous media with a non-uniform heat source

作　　者：李栋[1] 程锋利[2] 李贤宇[1] 

机构地区：[1]天津渤海职业技术学院,天津300022 [2]河北机电职业技术学院,河北邢台054048

出　　处：《计算机与应用化学》2011年第3期363-366,共4页Computers and Applied Chemistry

摘　　要：采用数值方法分析了具有非均匀内热源的竖直套管中复合对流传热传质,考查内热源分布系数M和热质二浮力比N对速度、温度、浓度分布以及Nusselt数和Sherwood数的影响,讨论了Da数对复合对流传热传质的影响。结果表明:当N>1时速度V为正,其值随N的增加而增大;当V<-1.5时,V则先负后正。随着M增大,内外壁面处流线密集Nusselt数和Sherwood数趋于稳定;Da数对传热传质的影响主要集中在壁面附近。A numerical analysis is conducted for combined heat and mass transfer by natural convection in the vertical annulus filled with saturated porous medium with a non-uniform generation and the forced convection in the vertical annulus, with the increase of M, the velocity in the inner wall get fast, and reverse flow occurred near outer wall. Local friction coefficient of inner inclined to the same value, and this value decrease with M increase. The Nusselt number and Sherwood number increase as M increases.

关 键 词：多孔介质 复合对流 传热传质 数值模拟 

分 类 号：TQ015.9[化学工程] TP391.9[自动化与计算机技术—计算机应用技术]