Dynamic Characteristics of Radiative Fluid Flow Across Time-Dependent Variable Radius Stretching Horizontal Cylinder With Chemical Reactive Process

This study explores the flow dynamics and heat transference of fluid along a stretchable horizontal cylinder with a variable radius depending on time in the existence of chemical reactions and thermal radiation. The mathematical model comprises a set of partial differential equations with boundary conditions that describe the changing flow, thermal radiation, mass movement, suction or injection, and chemical reactions. Similarity transformation reduces such a system to a set of ordinary differential equations. The resulting system is solved using numerical methods to find how velocity, temperature, and concentration change based on the similarity variable, showing the effects of important factors like the unsteadiness parameter, the Schmidt number, suction/injection, thermal radiation, and the chemical reaction rate. This study validates its numerical technique by comparing certain findings to those published in the literature for constraints. The findings show that the increase of the unsteadiness parameter enhances the flow acceleration. Increasing the unsteadiness parameter also increases the fluid temperature and concentration. Chemical reaction parameters tend to modify the concentration distribution by enhancing the species diffusion. Additionally, higher values of thermal radiation and suction parameters decrease fluid temperature. These findings help control the thermal and mass transport processes in chemical reactors, heat exchanger systems, polymer extrusions, and many other engineering applications.