Effect of convective transport mechanisms on heat transfer characteristics of nanofluids

In this study, efect of diferent slip mechanisms that can produce a slip velocity between nanoparticles and base fluid in a nano fluid flow feld has been investigated numerically. A two-phase Euler-Lagrange approach was applied to simulate heat transfer characteristics of diferent nanoparticles in a straight tube under laminar flow condition. Effect of diferent mechanisms such as thermophoresis, Brownian diusion, and Saman lift force on convective heat transfer was investigated and discussed. It is noticed that only Brownian difusion and thermophoresis are important slip mechanisms in nano fluids. In diferent nano fluids, efect of Brownian diusion and thermophoresis on convective heat transfer is diferent. While efect of Brownian diusion is more important in CuO-water nano fluid, thermophoresis is the main slip mechanism in Al2O3-water nano fluid.