A Numerical Study of the Effect of Viscous Dissipation on the Heat and Mass Transfer of a Rotatory Nano Fluid

Abstract

Abstract: Viscosity dissipation is the non-reversible conversion of mechanical energy into thermal energy that occurs when a fluid performs work on neighbouring layers as a result of the impact of shear forces. Thus, the purpose of this research is to address the viscous dissipation effect on boundary layer flow of rotating incompressible Cu-Water nanofluid over an elongating surface. The model equations are transformed into a set of nonlinear ordinary differential (ODE) equations using a similarity transformation prior to getting computationally analysed using the Lobatto III A method using MATLAB. The influence of various parameters such as Eckert number, rotation porosity parameter etc on the flow properties has been analysed. The analysis discloses that with the amplification of the rotation parameter, Eckert number, nanoparticle volume fraction, and the porosity the temperature of the fluid experiences an improvement. Moreover, the velocity in the secondary direction decreases with an increase in the rotation parameter.

Keywords: Boundary layer, rotatory flow, viscous dissipation, porous medium, Lobatto III A method.