Transient mixed convection flow arising due to thermal diffusion over a porous sensor surface inside a squeezing horizontal channel

A transient laminar mixed convection flow of viscous incompressible fluid generated by thermal buoyancy force, over a horizontal porous sensor surface placed inside a squeezing channel is analysed. The non-similar boundary layer equations for the flow and energy are solved numerically for different time regimes. The quantities of physical interest like skin friction coefficient, heat transfer coefficient, velocity and temperature profiles are calculated for different values of physical parameters, Pr, b, S and ξ. The implicit finite difference approximation together with Keller box method is employed for the solution for small and all time regime, where as, a series solution is found for large time regimes. A good agreement of the results computed by different methods has been observed.