An unsteady axisymmetric Williamson nanofluid flow over a radially stretching Riga plate for the inclusion of mixed convection and thermal radiation

Abstract

This paper aims to investigate the two-dimensional unsteady boundary layer flow phenomena of a Williamson nanofluid over a radially stretching Riga plate in the existence of mixed convection and thermal radiation. In addition to these, first-order slip, thermal and solutal boundary conditions are also considered. The enforcing governing equations of nonlinear PDE’s are distorted into a set of ODE’s to support given similarity transformations and stream functions. Further, these set of nonlinear equations with appropriate boundary conditions are solved by an “Optimal Homotopy Analysis Method” (OHAM). The characteristic behavior of relevant physical parameters on the dimensionless profiles is presented through the graphs and tables. It is interesting to note that the current results agree with the existing literature, which reveals the validity of the present work.

Keywords

• Williamson nanofluid
• Radially stretching Riga plate
• Mixed convection
• First order slip and chemical reaction
• Thermal and solutal Biot numbers
• OHAM