Computational analysis of flow separation in a mixed convection MHD flow over a vertical paraboloid: Case of externally retarded flow

Abstract

Combined effects of forced and natural convection on the occurrence of flow separation and heat transfer on a vertical paraboloid of revolution under the influence of a magnetic field are studied in this investigation. Inside the boundary layer, free convection is established due to the temperature difference between the fluid and the boundary while forced convection happens due to the presence of an external potential flow. The external potential velocity is chosen from the decelerated nature concerning the stream-wise coordinate due to which the flow separation is expected to occur. The influence of natural convection, the applied magnetic field, and the surface transverse curvature on delaying the flow separation and on the rate of heat transfer in the vicinity of the separation point is the aim of the investigation of this study. Regarding these important physical ingredients, the percentage increase in separation length and the rate of heat transfer are calculated. Moreover, their influence on the flow and heat-transfer phenomena has also been discussed in detail and presented through various graphs and tables. An exact numerical solution is obtained with the aid of an implicit finite difference scheme.