Second grade nanofluidic flow past a convectively heated vertical Riga plate

Abstract

The present communication is concerned with second grade nanofluidic flow past a convectively heated vertical Riga plate. A homogeneous first order chemical reaction effect is involved. Mixed convection in terms of aiding and opposing flow is analyzed. Mass diffusion is investigated involving nanoparticles zero mass flux condition at the surface of Riga plate. The Riga plate is a well known actuator comprising of permanently fixed magnets and electrodes in an alternative manner generating Lorentz force which exponentially decays with an away displacement from Riga plate. The set of governing partial differential equations is converted into set of nonlinear ordinary differential equations using usual transformations. Approximate convergent series solutions are achieved for the final transformed set of equations. Characteristics of velocity, temperature and concentration distributions are explored graphically for specific values of various fluid parameters. The flow parallel to the Riga surface along positive x-direction is assisted by the Lorentz forces instigated into the flow model by electromagnetic bars of Riga plate that results in exceeding the inside velocity from the free stream velocity. The opposing flow shows reduction in wall drag force due to the opposing influence of Lorentz forces that is very important finding in industrial applications of nanofluid. The first order homogeneous chemical reaction enhances the the concentration of nanoparticles.