JP Journal of Heat and Mass Transfer
Volume 19, Issue 1, Pages 155 - 174
(February 2020) http://dx.doi.org/10.17654/HM019010155 |
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MIXED CONVECTION WITH ENTROPY GENERATION IN A SQUARE CAVITY FILLED WITH HYBRID NANOFLUID
Ilhem Zeghbid and Rachid Bessaih
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Abstract: A numerical simulation was conducted in square cavities with different boundary conditions filled with Al2O3-Cu/water hybrid nanofluid, and heated by heat sources at a constant flux placed on the left vertical wall. The movable wall and the other walls of the cavities are maintained, respectively, at a cold local temperature Tc. The effects of the hybrid nanofluid on the flow of mixed convection and entropy generation in the four geometries with different boundary conditions are studied in the present work. The finite volume method was used to solve the thermal transfer flow equations across the physical domain with the SIMPLER algorithm. The influence of relevant parameters such as Richardson number, Reynolds number and volume fraction of nanoparticles on entropy generation and heat transfer rate have been studied in detail. It has been found that entropy generation decreases with increasing Richardson number, Reynolds number, and incorporation of an Al2O3-Cu/water hybrid nanofluid in the basic fluid improves the high heat transfer rate of indoors cavities. |
Keywords and phrases: hybrid nanofluid, entropy generation, mixed convection.
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