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ARTICLE

Non-Aligned Stagnation Point Flow of a Casson Fluid Past a Stretching Sheet in a Doubly Stratified Medium

N. Vijaya¹, G. Venkata Ramana Reddy^{1, *}, Y. Hara Krishna¹

1 Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, 522502, India.

* Corresponding Author: G. Venkta Ramana Reddy. Email: .

Fluid Dynamics & Materials Processing 2019, 15(3), 233-251. https://doi.org/10.32604/fdmp.2019.03727

Abstract

This paper investigates the problem of oblique hydro magnetic stagnation point flow of an electrically conducting Casson fluid over stretching sheet embedded in a doubly stratified medium in the presence of thermal radiation and heat source/absorption with first order chemical reaction. It is assumed that the fluid impinges on the wall obliquely. Similarity variables were used to convert the partial differential equations to ordinary differential equations. The transformed ordinary differential equations are solved numerically using Runge-Kutta-Fehlberg method with shooting technique. It is observed that a boundary layer is formed when the stretching velocity of the surface is less than the in viscid free stream velocity at a point decreases with increase in the nonNewtonian rheology parameter. The augmentation of the temperature is observed with the magnetic parameter, heat source parameter and thermal radiation parameter while a reverse effect with thermal stratification number, Prandtl number and the velocity ratio parameter. Influence of Skin friction coefficient, Nusselt number and Sherwood number on the flow configurations for different values of pertinent parameters are portrayed graphically and discussed. Numerical results are compared with the published results and are found to be in good agreement with previously published results as special cases of present problem. The mass concentration is seen to be decrease with Schmidt number, chemical reaction parameter and solutal stratification number.

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