At low to moderate Reynolds numbers, cast pin fin coldwalls provide the best performance and lowest unit cost for air-cooled electronics systems. Until recently, insufficient data existed to design coldwalls with moderate length pin fins for electronics systems. Empirical correlations for the Fanning friction factor, and the Colburn j-factor, were previously developed for two flow regimes with a transition Reynolds number, separating the two regimes. Using these correlations, the effect of configuration on the design is discussed and a design procedure is proposed. Example problems are presented for (1) a system cooled by an environmental control system, and (2) a system cooled by ambient air using a fan.
Design of Cast Pin Fin Coldwalls for Air-Cooled Electronics Systems
Contributed by the Electronic and Photonic Packaging Division for publication in the JOURNAL OF ELECTRONIC PACKAGING. Manuscript received March 2002. Associate Editor: A. Ortega.
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Short, , B. E., Price, D. C., and Raad, P. E. (April 30, 2004). "Design of Cast Pin Fin Coldwalls for Air-Cooled Electronics Systems ." ASME. J. Electron. Packag. March 2004; 126(1): 67–73. https://doi.org/10.1115/1.1648063
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