Entropy generation study of TiO2 nanofluid in microchannel heat sink for Electronic cooling application

Abstract

Development of Micro-electro-mechanical systems (MEMS) in the recent years has motivated and necessitated the study of flows in micro-scale geometries such as microchannel. Thermal management in ultra-densely packed electronic devices is highly essential to increase the reliability of the component without compromising packaging. The present study provides an experimental and numerical investigation on laminar forced convection in parallel microchannel heat sink accompanied with integrated Aluminium bulk heat spreader and ultrafine TiO2 nanoparticle based nanofluid for different wt. % ranging from 0.1-0.35 under different power ratings. Numerical study is performed to understand the flow hydrodynamics in microchannel to investigate the temperature distribution in bulk heat spreader with increased flow rates by implementing the thermo-physical properties. Furthermore, a study on Exergy and entropy generation for different fluids is also discussed. The experimental studies reveal that parallel microchannel increases the effectiveness of integrated cooling with a marginal temperature deviation between the heat sink and Aluminium bulk for a distance of 1.5 mm. Implementation of TiO2 nanofluid registered as a better working fluid than the pure fluid for all the experimental settings. � Published under licence by IOP Publishing Ltd.