Open AccessHeat Transfer Enhancement by Finned Heat Sinks with Micro-structured Roughness
Author(s) -
Luigi Ventola,
Eliodoro Chiavazzo,
Flaviana Calignano,
Diego Manfredi,
Pietro Asinari
Publication year - 2014
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/494/1/012009
Subject(s) - direct metal laser sintering , heat sink , materials science , surface finish , heat transfer , heat transfer enhancement , surface roughness , reynolds number , turbulence , composite material , mechanical engineering , metallurgy , mechanics , microstructure , engineering , physics
We investigated the benefits of micro-structured roughness on heat transfer performance of heat sinks, cooled by forced air. Heat sinks in aluminum alloy by direct metal laser sintering (DMLS) manufacturing technique were fabricated; values of the average surface roughness from 1 to 25 microns (standard milling leads to roughness around 1 micron) under turbulent regimes (Reynolds number based on heating edge from 3000 to 17000) have been explored. An enhancement of 50% in thermal performances with regards to standard manufacturing was observed. This may open the way for huge boost in the technology of electronic cooling by DML