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Thermal management using the bi-disperse porous medium approach

Narasimhan, Arunn and Reddy, BVK and Dutta, Pradip (2012) Thermal management using the bi-disperse porous medium approach. In: International Journal of Heat and Mass Transfer, 55 (4). pp. 538-546.

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Official URL: http://dx.doi.org/10.1016/j.ijheatmasstransfer.201...

Abstract

Thermal management of distributed electronics similar to data centers is studied using a bi-disperse porous medium (BDPM) approach. The BDPM channel comprises heat generating micro-porous square blocks, separated by macro-pores. Laminar forced convection cooling fluid of Pr = 0.7 saturates both the micro- and macro-pores. Bi-dispersion effect is induced by varying the macro-pore volume fraction phi(E), and by changing the number of porous blocks N-2, both representing re-distribution of the electronics. When 0.2 <= phi(E) <= 0.86, the heat transfer No is enhanced twice (from similar to 550 to similar to 1100) while the pressure drop Delta p* reduces almost eightfold. For phi(E) < 0.5, No reduces quickly to reach a minimum at the mono -disperse porous medium (MDPM) limit (phi(E) -> 0). Compared to N-2 = 1 case, No for BDPM configuration is high when N-2 >> 1, i.e., the micro-porous blocks are many and well distributed. The Nu increase with Re changes from non-linear to linear as N-2 increases from 1 to 81, with corresponding insignificant pumping power increase. (C) 2011 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Forced convection;Bi-disperse;Porous medium;Electronics cooling;Heat generation;Data centers;Numerical
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 04 Apr 2012 09:43
Last Modified: 04 Apr 2012 09:43
URI: http://eprints.iisc.ernet.in/id/eprint/44176

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