Convective heat transfer and pressure losses across novel heat sinks fabricated by Selective Laser Melting

By Matthew Wong, I. Owen, C. Sutcliffe, A. Puri. 2009

227 citations recorded by the source corpus.

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.

Subfields: Computational Mechanics, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/65f707e22dc0e3c93bea07cfb29fc2d11e75974c

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In Computational Mechanics

In Mechanical Engineering

Citations in the corpus

Effective design and simulation of surface-based lattice structures featuring volume fraction and cell type grading (2018, background): “Other properties of these structures that have attracted attention are their energy absorption under compressive and dynamic loading [1-5], their facility to act as heat exchangers [6,7], their applications in orthopaedic implants [8] and their potential to reduce noise and vibration transmission [9”
3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting (2019, background): “The desire to use lattice structures is driven by two motivators: (1) their wide range of applications, including structural lightweighting [12,57–61], impact protection [62,63], thermal management [64], bone implants [65–68], and vibration damping [69–72], (2) the prospect of achieving effective ma”
Roughness Effects on Flow and Heat Transfer for Additively Manufactured Channels (2015, background): “Few studies were found in the literature to have investigated convective heat transfer of specimens made with AM [4,12,13].”
Saturated pool boiling enhancement using porous lattice structures produced by Selective Laser Melting (2018, methodology): “[26] produced five heat sinks of various fin geometries using Al6061 material for air convective heat transfer and reported heat transfer enhancement for fins of elliptical and V-shaped geometries.”
Rough surfaces with enhanced heat transfer for electronics cooling by direct metal laser sintering (2014, background): “The ability of SLM to produce complex three-dimensional structures with features that would be difficult if not impossible to manufacture using conventional methods has been already explored for building heat sinks [31], as well as miniature heat exchangers and radiators [32].”
Design and evaluation of an additively manufactured aircraft heat exchanger (2018, methodology): “[13] used PBF AM to create novel 3-D heat sinks, and found that the in-”
Study on energy input and its influences on single-track,multi-track, and multi-layer in SLM (2012, background): “So far, the researches on SLM have included the following aspects: fundamental theory [8–10], manufacturing process [6, 11–13], application fields [ 14 , 15], and new materials research [16, 17], etc.”