Constructal design of combined microchannel and micro pin fins for electronic cooling

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dc.contributor.authorAdewumi, O.O
dc.contributor.authorBello-Ochende, T.
dc.contributor.authorMeyer, J.P
dc.date.accessioned2020-01-16T13:44:52Z
dc.date.available2020-01-16T13:44:52Z
dc.date.issued2013-07-10
dc.descriptionStaff publicationsen_US
dc.description.abstractThis paper presents a three-dimensional numerical study of steady, laminar, incompressible flow and forced convection heat transfer through a microchannel heat sink with micro pin fin inserts for both fixed and variable axial lengths. The objective of the study was to optimise the geometric configuration of anintegrated microchannel and micro pin fins for different solid volumes so that the peak temperature inthe configuration was minimised. The effect of the micro pin fins on the optimised microchannel was also investigated. The geometric optimisation of the integrated microchannel and micro pin fin was carried out using a computational fluid dynamics (CFD) code with a goal-driven optimisation tool subject to global constraints. The optimisation procedure was carried out in two steps. Firstly, the microchannel configuration was optimised without the micro pin fins inserted and the results were compared with similar work found in the open literature. This optimisation was carried out for both fixed and relaxed lengths. Thereafter, the integrated design of the microchannel and micro pin fins was optimised. The effect of the Bejan number on the solid volume fraction, channel aspect ratio and hydraulic diameter, pin fin aspect ratio, minimised peak temperature and maximised thermal conductance were reported. Results showed that as the Bejan number increased, the minimised peak temperature decreased. Also, the maximum thermal conductance increased with the optimised microchannel structure with three to six rows of micro pin fin inserts. Diminishing return set in when the number of rows of micro pin fin inserts was greater than three for the fixed length but for the relaxed length, as the number of rows increased, the results improved but when it exceeded six diminishing returns set in for a fixed solid volume of 0.9 mm3. For each Bejan number used in this study, there was an optimum channel hydraulic diameter and aspect ratio, solid volume fraction and pin fin aspect ratio that satisfied the global objective.en_US
dc.identifier.citationAdewumi, O. O., Bello-Ochende, T., & Meyer, J. P. (2013). Constructal design of combined microchannel and micro pin fins for electronic cooling. International Journal of Heat and Mass Transfer, 66, 315-323.en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/7422
dc.language.isoenen_US
dc.publisherInternational Journal of Heat and Mass Transferen_US
dc.relation.ispartofseriesInternational Journal of Heat and Mass Transfer;vol.66
dc.subjectForced convectionen_US
dc.subjectMinimised peak temperatureen_US
dc.subjectChannel hydraulic diameteren_US
dc.subjectChannel aspect ratioen_US
dc.subjectSolid volume fractionen_US
dc.subjectPin-fin aspect ratioen_US
dc.subjectBejan numberen_US
dc.subjectMicrochannel heat sinken_US
dc.subjectMicro pin finen_US
dc.subjectFixed lengthen_US
dc.subjectRelaxed lengthen_US
dc.subjectResearch Subject Categories::TECHNOLOGY::Engineering mechanicsen_US
dc.titleConstructal design of combined microchannel and micro pin fins for electronic coolingen_US
dc.typeArticleen_US
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