HEAT TRANSFER ENHANCEMENT OF Cu − $Al_{2}O_{3}$/ Water HYBRID NANOFLUID FLOW OVER A STRETCHING SHEET

Abstract

A new concept of Hybrid Nanofluid has been triggered to the enhancement of heat transfer in the boundary layer flow. New modeled thermophysical properties have been proposed. Experimental values of thermal conductivity is compared with our proposed model. Two different kinds of fluids namely Hybrid nanofluid (Cu − $Al_{2}O_{3}$/ Water) and Nanofluid (Cu/Water) are used to investigate the flow past a Stretching sheet. A parametric study has been carried out to explore the effects of physical parameters involved in the problem. From this study it is observed that, the Nusselt number of Hybrid nanofluid enhances upto 17.3% than pure water and 11.2% than nanofluid for 0.06 vol. concentration ($φ_{2}$). The heat transfer rate of Hybrid nanofluid (Cu − $Al_{2}O_{3}/ Water) is higher than that of Nanofluid (Cu/Water). By choosing different and appropriate nanoparticle combinations in Hybrid nanofluid, the desired heat transfer rate can be achieved.