Non-similar solution for unsteady water boundary layer flows over a sphere with non-uniform mass transfer

Purpose - The purpose of this paper is to make an analysis to study the non-similar solution for unsteady water boundary layer flow over sphere with the influence of temperature-dependent viscosity, Prandtl number, non-uniform surface mass transfer and heat transfer. Design/methodology/approach - The governing quasi-linear partial differential equations have been solved numerically using an implicit finite difference scheme along with a quasi-linearization technique. Non-similar solutions have been obtained from the starting point of the stream-wise coordinate to the point where the skin friction value vanishes. Findings - It is observed that non-uniform suction causes the point of vanishing skin friction to move downstream. The slot injection causes the vanishing skin friction to move upstream. Originality/value - The effect of unsteadiness is more significant on the skin friction as compared to the heat transfer.