Publication de 8 numéros par an
ISSN Imprimer: 1065-5131
ISSN En ligne: 1563-5074
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NUMERICAL INVESTIGATION OF HEAT-TRANSFER ENHANCEMENT IN A DIMPLED DIVERGING MICROCHANNEL WITH AL2O3–WATER NANOFLUID
RÉSUMÉ
Recent interest in high heat-flux removal applications in micropower devices and electronic cooling applications have contributed to the development of heat-transfer enhancement techniques in microchannels. Passive enhancement methods have been widely used by researchers to improve microchannel heat-transfer characteristics. The incorporation of multiple enhancement methods in microchannel heat sinks has proven to be advantageous in high heat-flux removal systems. The present study focuses on the application of improved heat-transfer properties of Al2O3–water nanofluids when used in conjunction with a diverging microchannel with a staggered dimpled surface to improve overall heat-transfer characteristics. We analyzed three-dimensional laminar incompressible internal convection flow field in a diverging microchannel with heat transfer from a dimpled surface using the SIMPLE algorithm with a second-order upwind scheme in a finite volume solver. We performed extensive computations to reveal thermohydraulic performance aspects of dimpled diverging microchannels for various heat- and mass-flux conditions. Our study was extended to analyze performance augmentation that is achieved when Al2O3–water nanofluids are used in such channels.
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Wang Rong , Xie Zhihui , Lu Zhuoqun , You Jiang , Ge Yanlin , SECOND LAW CONSTRUCTAL DESIGNS OF HYBRID SINGLE-FINNED AND STAGGER-FINNED MICROCHANNEL HEAT SINKS , Journal of Enhanced Heat Transfer, 29, 4, 2022. Crossref