Numerical study of non-Darcian natural convection in a square enclosure filled with a heat-generating porous medium

被引：0

作者：

Wang, Gang ^{[1
,2
]}

Zeng, Min ^{[1
]}

Wang, Qiu-Wang ^{[1
]}

机构：

[1] State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

[2] School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China

来源：

Hedongli Gongcheng/Nuclear Power Engineering | 2007年 / 28卷 / 04期

关键词：

Computer simulation - Flow fields - Heat transfer coefficients - Natural convection - Reactor cores - Temperature distribution;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Steady non-Darcian natural convection in a square cavity filled with a heat-generating porous medium is studied numerically by adopting the local thermal non-equilibrium model. The vertical walls maintain constant temperature T0 while the horizontal walls are considered to be adiabatic. The flow field is modeled by using the Brinkman-Darcy-Forchheimer model. Comprehensive numerical solutions are obtained in the wide range of two main dimensionless parameters, i.e. the effective fluid-to-solid thermal conductivity ratio, 0.001 &le γ &le 1.0, and the dimensionless volumetric heat transfer coefficient, 1.0 &le H &le 1000. The effects of γ and H on the flow and heat transfer characteristics are analyzed. It is found that the local thermal non-equilibrium model should be adopted at the low values of γ and H for predicting the flow and heat transfer characteristics exactly.

引用

页码：44 / 48