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In this particular study, we have considered the flow of Casson fluid over inclined flat and cylindrical surfaces, and have conducted a numerical analysis taking into account various physical factors such as mixed convection, stagnation point flow, MHD, thermal radiation, viscous dissipation, heat generation, Joule heating effect, variable thermal conductivity and chemical reaction. Flow over flat plate phenomena is observed aerospace industry, and airflow over solar panels, etc. Cylindrical surfaces are commonly used in several applications interacting with fluids, such as bridges, cables, and buildings, so the study of fluid flow over cylindrical surfaces is more important. Due to the motivation of these applications, in this paper, a comparative study of fluid flow over these two surfaces is considered. By applying appropriate similarity transformations, the governing PDEs of the problem have been transformed into non-linear ODEs, which are solved by utilizing the Keller box technique. We have examined the impact of distinct parameters by plotting velocity and thermal concentration graphs. All the profiles are plotted in both cases of cylindrical and inclined flat surface. It has been observed that for higher Casson and Magnetic parameter values, a decreasing velocity profile is noted for progressive values of the Eckert Number, thermal conductivity parameter, Joule heating parameter, heat generation, and growth in temperature profiles are witnessed. While the Prandtl number shows the opposite trend. Further, it has been observed that the concentration profile declines for incremental observations of Schmidt number and chemical reaction parameters. Computed Local parameters like the coefficient of skin friction for various values of Casson parameter and Curvature parameter, Skin friction value increases for increasing observations of Curvature parameter the phenomena agree with existing literature. Also, Nusselt number is calculated for various observations of curvature and variable thermal conductivity parameters. Nusselt number decreases in magnitude with rising observations of varying thermal conductivity argument at both flat and cylindrical surfaces. The values are matched with prevailing results and noted a good agreement.

Numerical Comparison of Stagnation Point Casson Fluid Stream over Flat and Cylindrical Surfaces with Joule Heating and Chemical Reaction Impacts