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Journal of Enhanced Heat Transfer

Theory and Application in High Performance Heat and Mass Transfer

ISSN for PRINT: 1065-5131

Institutional price:	$577.00
Issues per year:	4

Best Paper Award Selection - Editorial Board Site

2007, Volume14

111 pages

DOI: 10.1615/JEnhHeatTransf.v14.i4

Issue price - $160.00

Constructal Conjugate Heat Transfer in Three-Dimensional Cooling Channels

T. Bello-Ochende
Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria 0002, South Africa

Leon Liebenberg
Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria, 0002, South Africa

Arnaud G. Malan
Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria 0002, Rep. of South Africa

Adrian Bejan
Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708-0300, USA

Josua Meyer
University of Pretoria

ABSTRACT

This paper reports on three-dimensional geometric optimization of heat sinks and cooling channels where the objective is to maximize the global thermal conductance (minimize the thermal resistance), subject to two global constraints: fixed total volume and fixed channel volume. Heat transferred from the base is enhanced by two mechanisms, forced convection in the channel and conduction in the heat sinks. Numerical results showing the effects of dimensionless pressure drop, ratio of solid/fluid thermal conductivity on the optimized structure are reported. A test case shows a reduction of about 8% in thermal resistance when this method was applied to a known micro-channel heat sink model.