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, f = f(S/d, T/d, L/d, Red), and the Colburn j-factor, j = j(S/d, T/d, L/d, Red), were previously developed for two flow regimes with a transition Reynolds number, Retrn, 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.
- Electronic and Photonic Packaging Division
Design of Cast Pin Fin Coldwalls for Air-Cooled Electronics Systems
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Short, BE, Jr., Price, DC, & Raad, PE. "Design of Cast Pin Fin Coldwalls for Air-Cooled Electronics Systems." Proceedings of the ASME 2003 International Electronic Packaging Technical Conference and Exhibition. 2003 International Electronic Packaging Technical Conference and Exhibition, Volume 2. Maui, Hawaii, USA. July 6–11, 2003. pp. 47-55. ASME. https://doi.org/10.1115/IPACK2003-35004
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