Numerical Simulation of Nanofluids for Cooling Efficiency in Microchannel Heat Sink

N. H. Mohamad Noh; A. Fazeli; N. A. Che Sidik

Authors

N. H. Mohamad Noh Department of Thermofluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
A. Fazeli Department of Thermofluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
N. A. Che Sidik Department of Thermofluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia

Keywords:

Microchannel Heat Sink, Nanofluids, Numerical Simulation , Heat Transfer Enhancement

Abstract

Numerical simulation of a 3-D microchannel heat sink with rectangular cross section was conducted to investigate the effect of various types of coolants such as water and different nanofluids on the cooling performance of the microchannel heat sink (MCHS). The rectangular MCHS adopted has a diameter of 86 μm and length of 10 mm under the boundary conditions of constant heat flux and laminar flow with uniform inlet velocity. The present study illustrates that the use of Diamond-H2O as the coolant leads to higher efficiency of heat transfer by 0.3% compared to other nanofluid agents and base fluid. It is also shown that the trend of Nusselt number obeys the increment of Reynolds number.