Numerical simulation of a novel jet-impingement micro heat sink with cross flow under non uniform heating condition

Yanfeng Fan, Ibrahim Hassan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A novel micro heat sink applying the jet-impingement and cross flow is proposed to dissipate the heat from the electrical devices. Six hotspots of 2 mm × 2 mm are positioned on a flat plate of 25.4 mm × 25.4 mm. The area of flat plate except the hotspots is provided a constant heat flux of 20 W/cm2 as background heating source among cases. Four heat fluxes from 40 to 100 W/cm2 on the hotspots are tested to simulate the different operation conditions. The cross flow is used to remove the background heat flux and jet flow is supplied into the swirl microchannel, located at the right top of hotspot, to dissipate the large heat flux from hotspots. The channel depth is 0.5 mm and the width of swirl microchannel is 0.38 mm. The cross flow and jet flow velocity vary from 0.1 m/s to 0.5 m/s and from 0.5 m/s to 2 m/s, respectively. The effects of cross flow and jet flow on the cooling performance are investigated by numerical simulation. The local heat transfer coefficient and Nusselt number are calculated to evaluate the cooling performance of proposed micro heat sink for the targets of low maximum temperature, temperature gradient and pressure drop. The results show that the maximum temperature of the proposed design occurred at the outlet is approximately 65 °C among tested cases. The corresponding pressure drop is 5.5 kPa. The overall thermal resistance reaches as small as 0.23 K/W.

Original languageEnglish
Title of host publicationASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011
Pages441-449
Number of pages9
DOIs
Publication statusPublished - 1 Dec 2011
EventASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011 - Edmonton, AB, Canada
Duration: 19 Jun 201122 Jun 2011

Publication series

NameASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011
Volume1

Other

OtherASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011
CountryCanada
CityEdmonton, AB
Period19/6/1122/6/11

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ASJC Scopus subject areas

  • Process Chemistry and Technology

Cite this

Fan, Y., & Hassan, I. (2011). Numerical simulation of a novel jet-impingement micro heat sink with cross flow under non uniform heating condition. In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011 (pp. 441-449). (ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2011; Vol. 1). https://doi.org/10.1115/ICNMM2011-58002