Convective heat transfer and pressure losses across novel heat sinks fabricated by selective laser melting

Wong, M. and Owen, I. and Sutcliffe, C. J. and Puri, A. (2009) Convective heat transfer and pressure losses across novel heat sinks fabricated by selective laser melting. International Journal of Heat and Mass Transfer, 52 (1-2). pp. 281-288. ISSN 0017-9310

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Full text URL: http://dx.doi.org/10.1016/j.ijheatmasstransfer.200...

Abstract

This study presents the thermal and fluid flow characteristics of five heat sinks that have been fabricated
by a rapid manufacturing technique known as Selective Laser Melting. The five heat sinks consist of two
conventional designs, the cylindrical pin and rectangular fin array, for comparison purposes, and three
novel heat sinks: a staggered elliptical array; a lattice; and a rectangular fin array with rounded corners.
The experimental results for the rectangular fin were compared with data from the literature and were
found to be consistent. The rectangular fin with rounded corners proved able to transfer the largest
amount of heat whilst improving upon the pressure drop performance of the standard rectangular fin
array. Although the lattice arrangement made use of the fabrication process’ ability to manufacture heat
sinks with high surface area to volume ratios, its performance was limited by the lack of interaction
between the cooling air and structure. In terms of both heat transfer performance and pressure drop,
the staggered elliptical array, which cannot be manufactured by conventional techniques, outperformed
the other heat sinks.

Item Type:Article
Additional Information:This study presents the thermal and fluid flow characteristics of five heat sinks that have been fabricated by a rapid manufacturing technique known as Selective Laser Melting. The five heat sinks consist of two conventional designs, the cylindrical pin and rectangular fin array, for comparison purposes, and three novel heat sinks: a staggered elliptical array; a lattice; and a rectangular fin array with rounded corners. The experimental results for the rectangular fin were compared with data from the literature and were found to be consistent. The rectangular fin with rounded corners proved able to transfer the largest amount of heat whilst improving upon the pressure drop performance of the standard rectangular fin array. Although the lattice arrangement made use of the fabrication process’ ability to manufacture heat sinks with high surface area to volume ratios, its performance was limited by the lack of interaction between the cooling air and structure. In terms of both heat transfer performance and pressure drop, the staggered elliptical array, which cannot be manufactured by conventional techniques, outperformed the other heat sinks.
Keywords:heat sink, rapid prototyping, selective laser melting
Subjects:H Engineering > H300 Mechanical Engineering
Divisions:College of Science > School of Engineering
ID Code:6296
Deposited By: Ieuan Owen
Deposited On:27 Sep 2012 15:19
Last Modified:27 Sep 2012 15:19

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