Changes in boundary layer flow due to suction and blowing of a non-Newtonian fluid as that fluid travels closer and closer to an exponentially increasing surface are the primary focus of this research. The behavior of fluids that are not of the Newtonian type may be defined with the help of the Casson model. The equation that is used to describe the temperature field has a variable that is meant to represent thermal radiation. “This study presents a comprehensive investigation of the flow behavior of Casson fluid over a porous stretching surface, considering the effects of heat transfer and thermal radiation. The Casson fluid model is employed to describe the non-Newtonian characteristics of the fluid, which is encountered in numerous industrial applications. The governing equations for the flow, heat transfer, and radiation are derived using the conservation laws of mass, momentum, and energy. The resulting system of nonlinear partial differential equations is solved numerically using an efficient computational method. The velocity, temperature, and concentration profiles are obtained for different values of the physical parameters involved in the problem. The analysis reveals that the velocity and temperature profiles are significantly influenced by the Casson fluid parameter, the radiation parameter, the Prandtl number, the Eckert number, and the permeability parameter. Moreover, it is observed that increasing the Casson fluid parameter leads to a reduction in the velocity profile, while an increase in the radiation parameter enhances the temperature distribution near the surface. the study examines the skin friction coefficient, the Nusselt number, and the Sherwood number to assess the heat and mass transfer characteristics of the system. The results show that the skin friction coefficient decreases with increasing Casson fluid parameter, while the Nusselt and Sherwood numbers increase with the radiation parameter. the present study provides valuable insights into the flow behavior of Casson fluid over a porous stretching surface with heat transfer and thermal radiation. The findings offer significant implications for optimizing various industrial processes involving non-Newtonian fluids and porous media”. The outcomes of this research will contribute to the design and development of more efficient heat exchangers and fluid flow control systems in engineering applications. Researchers have discovered that a higher value for the suction parameter also results in a higher value for the skin-friction coefficient..