NUMERICAL-ANALYSIS OF HEAT-TRANSFER BY NATURAL-CONVECTION AND RADIATION IN PARTICIPATING FLUIDS ENCLOSED IN SQUARE CAVITIES

被引：20
|
作者：
DRAOUI, A
ALLARD, F
BEGHEIN, C
机构：
[1] Centre de Thermique, URA CNRS 1372, Laboratoire Equipement de l’Habitat, Institut National des Sciences Appliquees, Villeurbanne Cedex, 69621
来源：
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS | 1991年 / 20卷 / 02期
关键词：
Boussinesq-Obberbeck Approximation - Natural Convection Heat Transfer - Navier-Stokes Equations - Scattering Albedo Effect - Thermal Radiation Effects - Thermally Driven Cavity;
D O I：
10.1080/10407789108944820
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The influence of thermal radiation on natural convection in a participating fluid contained in a square cavity is studied numerically. The radiative transfer process is solved from the P1 approximation. The Navier-Stokes equations are solved by a finite difference scheme integrated over control volumes. A numerical study of the so-called window problem (thermally driven cavity) shows the influence of thermal radiation on this reference problem for Rayleigh numbers in the range of 10(3) - 10(7) and Planck numbers varying from 1 to 0.05. The isotherms, streamlines, and heat lines show an increase of the dynamical effects in the central part of the cavity and a significant modification of the boundary layers. Results obtained from the simulation of an isotropically scattering medium are given.
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页码：253 / 261
页数：9
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