Least-energy optimization of air-cooled heat sinks for sustainable development

Bar‐Cohen, Avram; Iyengar, Madhusudan

doi:10.1109/tcapt.2003.811463

Cited by 44 publications

(23 citation statements)

References 17 publications

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“…It is not necessary to resort to an empirical combination of limiting heat transfer cases, namely, heat transfer in the entry region and heat transfer for a very long heat sink [1]. There is also no need for a numerical integration along the flow passage using local values of heat transfer coefficient and fin efficiency [4].…”

Section: Discussionmentioning

confidence: 99%

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Modelling and simulation techniques for forced convection heat transfer in heat sinks with rectangular fins

Jouhara

Axcell

2009

Simulation Modelling Practice and Theory

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This paper provides a comprehensive description of the thermal conditions within a heat sink with rectangular fins under conditions of cooling by laminar forced convection. The analysis, in which increasing complexity is progressively introduced, uses both classical heat transfer theory and a computational approach to model the increase in air temperature through the channels formed by adjacent fins and the results agree well with published experimental data.The calculations show how key heat transfer parameters vary with axial distance, in particular the rapid changes in heat transfer coefficient and fin efficiency near the leading edges of the cooling fins. Despite these rapid changes and the somewhat ill-defined flow conditions which would exist in practice at the entry to the heat sink, the results clearly show that, compared with the most complex case of a full numerical simulation, accurate predictions of heat sink performance are attainable using analytical methods which incorporate average values of heat transfer coefficient and fin efficiency. The mathematical modelling and solution techniques for each method are described in detail.

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Section: Discussionmentioning

confidence: 99%

“…Finally the overall rate of heat removal from the flow passage can again be calculated using equation (12). This essentially was the approach adopted by Bar-Cohen and Iyengar [4] for the thermal analysis in their paper.…”

Section: (Iii) Analysis Using Numerical Integration Along the Flow Pamentioning

confidence: 99%

Modelling and simulation techniques for forced convection heat transfer in heat sinks with rectangular fins

Jouhara

Axcell

2009

Simulation Modelling Practice and Theory

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“…Free convection in partitioned spaces is of particular interest in many engineering applications as noted by [1][2][3][4][5][6][7]. Hence, a great deal of information is available on heat and fluid flow through such enclosures as reviewed by Bejan [8].…”

Section: Introductionmentioning

confidence: 99%

Entropy generation for natural convection by heated partitions in a cavity

Famouri

Hooman

2008

International Communications in Heat and Mass Transfer

117

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Entropy generation for natural convection in a partitioned cavity, with adiabatic horizontal and isothermally cooled vertical walls, is studied numerically by both a FORTRAN code and the commercially available CFD-ACE software. Effects of the Rayleigh number, the position of the heated partition, and the dimensionless temperature difference on the local and average entropy generation rate are investigated. Proper scale analysis of the problem showed that, while fluid friction term has nearly no contribution to entropy production, the heat transfer irreversibility increases monotonically with the Nusselt number and the dimensionless temperature difference.

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“…Similarly, Khan et al [12] applied EGM techniques to optimize a pin fin heat sink. Bar-Cohen and Iyengar [13,14] presented methods of optimizing a parallel plate heat sink. Their methods accounted for the energy used in the manufacture of the heat sink and the cooling energy used over the expected life of the computer in which it resides; their optima sometimes differed from the EGM optima, since the latter did not account for manufacturing energy.…”

Section: Background Literaturementioning

confidence: 99%