Two-Phase Numerical Simulation of Flow and Heat Transfer of Nanofluids in a Microchannel Heat Sink Using Homogeneous Mixture Model

Abstract

In this paper, flow and laminar convective heat transfer of nanofluids in two dimensional parallel plate microchannel have been studied without and with considering the conjugate heat transfer numerically. Two types of nanoparticles are considered in this study, the Aluminium oxide and Titanium oxide with the diameters of 47nm and 27 nm, respectively. The simulation is conducted for Reynolds numbers of Re≤16, 1% to 4% volume concentration range , and different conductivity of heat sink to conductivity of base fluid. Moreover, the two phase homogenous mixture model has been used to study the fluid. Continuity, momentum, energy and volume fraction of nanoparticles equations are solved using a finite volume method. The presence of nanoparticles causes changes in the velocity profile and nondimensionalized temperature distribution. It is observed that the heat transfer rate enhances with an increase in Reynolds number, conductivity of heat sink and the use of the nanofluid Alumina/ water in comparison with Titanium oxide/water. Homogeneous two-phase mixture model results are in good agreement with the numerical results of other researchers.

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Journal of Solid and Fluid Mechanics
Volume 3, Issue 2 - Serial Number 2
September and October 2013
Pages 51-63

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