Thermal management using the bi-disperse porous medium approach

Narasimhan, Arunn ; Reddy, B. V. K. ; Dutta, Pradip (2012) Thermal management using the bi-disperse porous medium approach International Journal of Heat and Mass Transfer, 55 (4). pp. 538-546. ISSN 0017-9310

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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 ΦE, and by changing the number of porous blocks N2, both representing re-distribution of the electronics. When 0.2 ΦE 0.86, the heat transfer Nu is enhanced twice (from ~550 to ~1100) while the pressure drop Δp reduces almost eightfold. For ΦE < 0.5, Nu reduces quickly to reach a minimum at the mono-disperse porous medium (MDPM) limit (ΦE → 0). Compared to N2 = 1 case, Nu for BDPM configuration is high when N2 » 1, i.e., the micro-porous blocks are many and well distributed. The Nu increase with Re changes from non-linear to linear as N2 increases from 1 to 81, with corresponding insignificant pumping power increase.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Forced Convection; Bi-disperse; Porous Medium; Electronics Cooling; Heat Generation; Data Centers; Numerical
ID Code:80900
Deposited On:20 Jun 2012 13:51
Last Modified:20 Jun 2012 14:00

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