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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

THERMAL PERFORMANCE ANALYSIS OF MICRO-CHANNEL HEAT SINK WITH NON-UNIFORM METAL FOAM DESIGN

Get access (open in a dialog) DOI: 10.1615/IHTC16.ctm.022760
pages 3681-3688

Sinopsis

In this study, a concept of metal foam heat sink with non-uniform pore density or non-uniform porosity distribution varied in normal and parallel to the flow direction is developed and numerically investigated. Numerical simulation is performed by employing the Forchheimer-Brinkman extended Darcy momentum model and the non-equilibrium energy model, to examine the effects of non-uniform metal foam configuration on hydraulic and thermal performance in comparison of uniform metal foam. The results indicate that, compared with the uniform metal foam heat sink, the enhancement of heat transfer and reduction of pressure drop can be achieved simultaneously with a proper design of non-uniform metal foam configuration. The non-uniform pore density metal foam heat sink demonstrates more favorable in thermal performance, by employing the three-layer metal foam configuration with pore density of 40 PPI-60 PPI-80 PPI normal to the flow direction, with a constant porosity of 0.9. In addition, the cooling performance of non-uniform porosity metal foam heat sink is more superior by arranging metal foam porosity of 0.9-0.85-0.8 in the flow direction with pore density of 60 PPI. Consequently, the non-uniform metal foam heat sink may provide a promising alternative to enhance the cooling efficiency for high heat flux electronic device.