Entropy generation minimization of nanofluid flow in a MHD channel considering thermal radiation effect

Abstract

The purpose of this article is the total entropy generation minimization of the nanofluid magneto-hydrodynamic (MHD) flow through a channel formed by two parallel isothermal plates considering thermal radia-tion effect. Air is the main fluid and three types of nano-particles such as Al2O 3, Ti and Cu are examined. The ve-locity and temperature fields are obtained from solution of the momentum and energy equations analytically. The local and total entropy generation rates are calculated and then the total entropy generation rate is presented graph-ically versus governing dimensionless parameters. Electri-cal efficiency, radiation parameter, nanoparticles volume fraction, Hartman and Peclet numbers are considered in this work. The results show that there are conditions in which the total entropy generation rate could be optimized.