Numerical study of the thermal performance and pressure drops of water-based Al2O3 - Cu hybrid nanofluids of different compositions in a microchannel heat sink
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Date
2022
Authors
Omosehin, O.S.
Adelaja, A.O.
Olakoyejo, O.T.
Oyekeye, M.O.
Journal Title
Journal ISSN
Volume Title
Publisher
Microfluidics and Nanofluidics
Abstract
This paper numerically investigates the effects of hybridization of water-based copper-alumina nanofluid on the thermal performance, pressure drop, and the figure of merit (FOM) inside a three-dimensional microchannel heat sink. The heat sink comprises a copper block with the top covered by a polycarbonate plastic (Lexan) to form a closed microchannel. A constant heat flux of 1.0 MW/m2 is applied at the base of the heat sink. The Reynolds number is varied between 400 and 1200 for different volume concentrations of alumina and copper nanoparticles of 0.5–3.0% vol. Simulation in ANSYS Fluent is performed with a two-phase Eulerian-Eulerian model using the finite volume approach to solve the conjugate heat
transfer problem. Experimental validations of the numerical models are in very good agreement. Furthermore, the result
shows that the higher the relative concentration of copper nanoparticles, the better the thermal enhancement and FOM of
the hydridized nanofluid. For design and operational conditions, the maximum FOM favour the concentration of copper
nanoparticle ≥ 0.75% for Re of 400 and < 0.75% vol. for Re of 1200.
Description
Scholarly article
Keywords
Hybrid nanofluid , Thermal performance , Pressure drop , Microchannel , Heat sink , Research Subject Categories::TECHNOLOGY
Citation
Omosehin, O.S. Adelaja, A.O. Olakoyejo, O.T. Oyekeye, M.O (2022). Numerical study of the thermal performance and pressure drops of water-based Al2O3 - Cu hybrid nanofluids of different compositions in a microchannel heat sink