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Proceedings of Symposium on Energy Engineering in the 21<sup>st</sup> Century (SEE2000) Volume I-IV

ISSN:
1-56700-132-7 (Print)

HEAT TRANSFER OF A POROUS CHANNEL HEAT SINK SUBJECTED TO OSCILLATING FLOW

Huili Fu
School of Mechanical and Production Engineering, Nanyang Technological University 50 Nanyang Avenue, Singapore 639798

Kai Choong Leong
School of Mechanical and Aerospace Engineering Nanyang Technological University 50 Nanyang Avenue, Singapore 639798 Republic of Singapore

Xiaoyang Huang
School of Mechanical and Production Engineering, Nanyang Technological University 50 Nanyang Avenue, Singapore 639798

Chang-Yu Liu
School of Mechanical & Production Engineering, Nanyang Technological University, Singapore

Abstract

In this paper, experiments have been conducted to study the heat transfer of a porous channel heat sink subjected to oscillating flow. The surface temperature distributions for both steady and oscillating flows were measured. The local and length-averaged Nusselt numbers were measured and analyzed. The experimental results revealed that the surface temperature distribution for oscillating flow is more uniform than that for steady flow. Due to the reversing flow direction, there are two thermal entrance regions for oscillating flow. The length-averaged Nusselt number for oscillating flow is much higher than that for steady flow. The porous channel heat sink subjected to oscillating flow can be considered as an effective method for cooling high-speed electronic devices.