Коллоидный журнал

In this paper, effects of heat generation/absorption and chemical reaction on magneto-hydrodynamic (MHD) mixed convective stagnation point flow along a vertical stretching sheet are investigated. To enhance the heat transfer rate Cu-water nanofluid has been considered. It is assumed that the sheet is saturated in moving porous medium and an external magnetic field is working normal to the surface. In this study, more attention has been paid to velocity ratio, heat source/sink, mass diffusion and chemical reaction effects. The present study not only generalizes the previous studies but also has many physical applications. Mathematical model of the problem contains coupled partial differential equations. Suitable similarity transformations are used to reduce these equations into nonlinear ordinary differential equations. The model has been solved numerically by Runge-Kutta fourth order method with shooting approach. The consequences of diversified controlling parameters on fluid velocity, temperature and concentration are drawn numerically in a few plots and discussed. The non-dimensional shear stress, heat, and mass transfer at the surface are tabulated for numerous values of velocity ratio parameter ranging from 0.5 to 3.0, heat source/sink parameter from -2 to 2, Schmidt number from 0.5 to 2, solid volume fraction from 0.2 to 0.3, and chemical reaction parameter from 0.1 to 0.9.