Entropy generation in flow with silver and copper nanoparticles

Abstract

The purpose of this attempt is mainly to explore the mixed convective flow of viscous fluid by a rotating disk. Thermal radiation, Joule heating, variable thickness and viscous dissipation have been accounted. Flow under consideration is because of nonlinear stretching characteristics of disk. Water is treated as traditional fluid while nanoparticles include silver and copper. Fluid is electrically conducting subject to applied magnetic field with constant strength. Heat generation and absorption is neglected. An entropy generation analysis is utilized through second law of thermodynamics. The effects of silver and copper nanoparticles on the thermal conductivity of continuous phase fluid and entropy generation have been also examined. Total entropy generation rate is scrutinized for different involved variables. Nonlinear formulation based upon conservation laws of mass, momentum and energy is made. Attention is particularly given to the convergence in the computational process. Velocity and thermal gradients at the surface of disk are obtained in tabular forms. Main conclusions have been indicated.