Entropy generation of MHD forced convection nanoliquid in a channel containing three cylinder blocks

Abstract

The present study is a numerical simulation of nanoliquid (Cu- water) MHD forced convection in a channel containing three cylinder blocks. The simulations were made at 50 ≤Re≤200, 0≤Ha≤50, nanoparticles volume fraction between 0%and 4%. The Brownian motion was considered in calculating the effective nanoliquid thermal conductivity and viscosity. The lattice-Boltzmann method is used to solve the continuity, momentum and energy equations. The effects of Reynolds number and nanoparticles volume fraction on heat transfer and Bejan number were studied. The results demonstrate that average Nusselt number is enhanced by increase of Reynolds number, Hartmann number and addition of nanoparticles. Bejan number decrease with Reynolds number and Hartmann number but it is increase with addition of nanoparticles volume fraction.