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Abstract
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The ?uid ?ow and heat transfer characteristics of laminar nano?uid ?ow in microchan-
nel heat sink (MCHS) with V-Type inlet/outlet arrangement are numerically studied. A constant
heat ?ux boundary condition is applied on the base plate of MCHS and all the other surfaces of
MCHS are insulated. Four different kinds of nano?uids are utilized as working ?uids which are
SiO2,Al2O3, ZnO and CuO dispersed in pure water as a base ?uid. Three different volume fractions
of 1%, 1.5% and 2% and three distinctive nanoparticle diameters of 30 nm, 40 nm and 60 nm were
employed. The results specify that the SiO2 nano?uid has the uppermost heat transfer rate com-
pared to other tested nano?uids. Increasing the nanoparticles volume fraction together with
decreasing the nanoparticles diameter enhances the Nusselt number value. The pressure drop coef-
?cient did not change signi?cantly by using nano?uid with various volume fractions and varied
nanoparticle diameters. Moreover, the results indicate that nano?uid can enhance the performance
of MCHS with V-shaped inlet/outlet arrangement.
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