Heat flow visualization for unsteady Casson fluid past a vertical slender hollow cylinder

The conjugate heat transfer (CHT) effects have been studied on the heat function concept. The physical model consists of the Casson fluid flowing past a slender vertical cylinder. The inner wall of the hollow cylinder is maintained with identical temperature. The solutions of the governing equations which are coupled and non-linear are found by applying implicit scheme. The plots on the flow are depicted pictorially for all the controlling parameters. The steady-state time is extended for the Casson fluid parameter. The Bejan's heat flow visualization implies that the heat function contours are compact in the neighbourhood of leading edge at the wall of the cylinder having more temperature. The deviations of the heatlines from the hot wall go on reducing by escalating the values of all the controlling parameters. The Casson fluid plays a significant role at the hot wall when compared to the Newtonian fluid.