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International Heat Transfer Conference 9

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

A NUMERICAL STUDY OF NATURAL CONVECTION IN AN EXTERNALLY HEATED ENCLOSURE WITH A LOCAL HEAT SOURCE

Jiliang Xia
Institute of Engineering Thermophysics Chongqing University, Chongqing 630044, China

Mingdao Xin
Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, P. R. China

Hong-Ji Zhang
Department of Heat Power Engineering, Chongqing University, Chongqing, 630044 People's Republic of China

DOI: 10.1615/IHTC9.3060
pages 217-222

Abstract

Numerical study is conducted for unsteady and steady, two-dimensional, laminar, natural convection heat transfer in an externally heated enclosure containing a local internal heat source. The effects of external Rayleigh number, internal Rayleigh number, position and size of the local internal heat source are systematically examined on natural convection in the enclosure. The transient control regime, the equivalent relative intensity of local internal heat source and the transient equivalent relative intensity of the heat source are defined. Velocity vector plots and temperature profiles in the enclosure are presented, and the average and local Nusselt numbers on the hot and cold surfaces are given.

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