Archivio Istituzionale della RicercaWe 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 DMLS.
Heat Transfer Enhancement by Finned Heat Sinks with Micro-structured Roughness / Ventola, Luigi; Chiavazzo, Eliodoro; Calignano, Flaviana; Manfredi, DIEGO GIOVANNI; Asinari, Pietro. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6596. - ELETTRONICO. - 494:(2014), pp. 012009-1-012009-9. (Intervento presentato al convegno International Conference on Microtechnology and Thermal Problems in Electronics, MicroTherm' 2013 tenutosi a Lodz (Poland) nel 25 -28 June 2013) [10.1088/1742-6596/494/1/012009].
Heat Transfer Enhancement by Finned Heat Sinks with Micro-structured Roughness
VENTOLA, LUIGI;CHIAVAZZO, ELIODORO;CALIGNANO, FLAVIANA;MANFREDI, DIEGO GIOVANNI;ASINARI, PIETRO
2014
Abstract
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 DMLS.
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https://hdl.handle.net/11583/2539692
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