Investigation of flow and heat transfer of an impinging jet in a cross-flow for cooling of a heated cube
2006 (English)In: Journal of Electronic Packaging, ISSN 1043-7398, Vol. 128, no 2, 150-156 p.Article in journal (Refereed) Published
Thecurrent trends toward the greater functionality of electronic devices areresulting in a steady increase in the amount of heatdissipated from electronic components. Forced channel flow is frequently usedto remove heat at the walls of the channel wherea PCB with a few high heat dissipating components islocated. The overall cooling strategy thus must not only matchthe overall power dissipation load, but also address the requirementsof the "hot" components. In order to cool the thermalload with forced channel flow, excessive flow rates will berequired. The objective of this study is to investigate iftargeted cooling systems, i.e., an impinging jet in combination witha low velocity channel flow, can improve the thermal performanceof the system. The steady-state three-dimensional (3-D) model is developedwith the Reynolds-Stress-Model (RSM) as a turbulence model. The geometricalcase is a channel with a heated cube in themiddle of the base plate and two inlets, one horizontalchannel flow, and one vertical impinging jet. The numerical modelis validated against experimental data obtained from three well-known cases,two cases with an impinging jet on a flat heatedplate, and one case with a heated cube in asingle channel flow. The effects of the jet Re andjet to-cross-flow velocity ratio are investigated. The airflow pattern aroundthe cube and the surface temperature of the cube aswell as the mean values and local distributions of theheat transfer coefficient are presented.
Place, publisher, year, edition, pages
2006. Vol. 128, no 2, 150-156 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-46016DOI: 10.1115/1.2188948OAI: oai:DiVA.org:liu-46016DiVA: diva2:266912