Authors: Dr. G. Sugendran, Surinder Kumar
Abstract: The continuing shrinking trend of electronics along with growing power densities has resulted in many heat dissipation difficulties. Microchannel heat sinks are promising and compact heat sinks but limited by thermal performance due to thermal capabilities of traditional coolant fluids. This work examines the prospect of using hybrid nanofluids, i.e., a mixture of several different nanoparticles, to improve the convective heat transfer coefficients of microchannel flow. A detailed numerical analysis based on the two-phase Eulerian-Eulerian approach is performed to assess the thermohydrodynamic properties of aluminum oxide-copper/water hybrid nanofluid through rectangular microchannels under Reynolds numbers between 200 and 1000 and nanoparticle volume fractions between 0.5% and 2.0%. The simulations reveal a considerable heat transfer enhancement where the Nusselt number rises up to 38.4% at 1.0% volume fraction while reducing the thermal resistance by 29.6% and achieving the highest thermal efficiency ratio of 1.31. Although there is an increased pressure drop (18.7%), the thermal-hydraulic performance proves the feasibility of hybrid nanofluids as a new coolant.
DOI: http://doi.org/10.5281/zenodo.21697150
