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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN 印刷: 2152-5102
ISSN オンライン: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v43.i5-6.60
pages 441-455

Increased Heat Load Effects on the Thermal Performance of Single- and Two-Layered Microchannels with Varying Axial Length and Micro Pin-Fin Inserts

Tunde Bello-Ochende
Department of Mechanical Engineering, University of Cape Town, Cape Town, Private Bag X3, Rondebosch, 7701, South Africa
Olayinka Omowunmi Adewumi
Department of Mechanical Engineering, University of Lagos, Akoka-Yaba, Lagos, Nigeria
Josua Petrus Meyer
Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria, Private Bag X20, Hatfield, 0028, South Africa

要約

This study investigates numerically the effect of increasing heat load on thermal performance of six different heat sinks. The heat sinks examined were the single-layered microchannel, two-layered microchannel with parallel and counter-flow configurations, single-layered microchannel with micro pin-fin inserts and the two-layered microchannels with micro pin fins inserts and different flow configurations. The objective of this investigation was to identify the heat sink that performs best under high heat load conditions. The thermal performance was based on two criteria namely, minimised peak temperature and minimised temperature rise on the heated base of the solid substrate. The heat load on the heated base was increased from 100 to 1000 W and results obtained showed that inserting micro pin fins into the microchannels enhances the thermal performance of the heat sink under increased heat load. Also, for the highest heat load of 1000 W and lowest pressure drop of 10 kPa considered, the single-layered microchannel with six rows of micro pin-fin inserts performed best in minimising temperature rise on the heated base while the two-layered microchannel with four rows of micro pin-fin inserts performed best in minimising peak temperature.


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