TURBULENT THERMAL CONVECTION IN AN ENCLOSURE WITH INTERNAL HEAT GENERATION.

被引：0

作者：

Farouk, B. ^{[1
]}

机构：

[1] Drexel Univ, Philadelphia, PA, USA, Drexel Univ, Philadelphia, PA, USA

来源：

Journal of Heat Transfer | 1988年 / 110卷 / 01期

关键词：

FLOW OF FLUIDS - Turbulent - HEAT TRANSFER - Convection - VISCOSITY;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Numerical results are presented for turbulent thermal convection, driven by uniform volumetric energy sources for two-dimensional flows in a rectangular enclosure. Rigid adiabatic sides and a rigid isothermal upper surface are considered. For the rigid bottom surface, zero heat flux boundary conditions are used. Computations are carried out for Prandtl number equals 6. 5 and Rayleigh number (based on enclosure depth L) range of 10**6 to 10**1**0. The aspect ratio (L/X) of the enclosure was maintained at 0. 5 for all cases. The turbulence model used in this study is a k- epsilon model, which characterizes turbulence through the kinetic energy and its volumetric rate of dissipation. Buoyancy effects on the turbulence structure are accounted for. Results show the transition from well-ordered multicellular flow to fully turbulent flow within the enclosure as the Rayleigh number increases.

引用

页码：126 / 132