INFLUENCE OF THERMAL DISPERSION ON NATURAL-CONVECTION HEAT-TRANSFER IN POROUS-MEDIA

被引：18
|
作者：
BEJI, H
GOBIN, D
机构：
[1] Fluides, Automatique, et Systémes Thermiques (FAST), Laboratoire de I’University Pierre et Marie Curie associé au CNRS, Campus Universitaire, Orsay, 91405
来源：
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS | 1992年 / 22卷 / 04期
关键词：
D O I：
10.1080/10407789208944779
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This work presents a numerical study of natural convection in a two-dimensional, rectangular, porous medium, differentially heated from its vertical walls. A finite-volume procedure is used to solve the Darcy-Brinkman-Forchheimer model with one energy equation. The purpose of the study is to analyze the effect of thermal dispersion, considering that the effective thermal conductivity of the porous medium depends on the local filtration velocity. The introduction of thermal dispersion in the classical Darcy-Brinkman-Forchheimer model leads to a significant increase in the overall heat transfer and to better agreement with the experimental data, particularly when the thermal conductivities of the fluid and the solid matrix are similar.
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页码：487 / 500
页数：14
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