The Yamada-Ota model-based Casson quadra hybrid nanofluid stagnation flow configured by ohmic heating, heat source, and Newtonian boundary heating across an exponentially stretched cylinder

Abstract

An engine oil-driven Yamada-Ota model-based Casson quadra hybrid nanofluid flow, comprising spherical-shaped Silver, Copper, Graphene, and Molybdenum sulfide nanoparticles, is studied over a stretched cylinder in a porous medium. The investigation focuses on enhancing thermal efficiency by incorporating ohmic heating, boundary heating, velocity ratio, viscous dissipation, and heat source effects, which are pivotal for applications in thermal exchangers, bioengineering devices, and material processing. The contrast between Casson fluid and Casson quadra hybrid nanofluid flows is analyzed. Using the bvp4c method, numerical simulations reveal the impact of magnetic fields, inclination angles, porosity, Biot numbers, viscous dissipation, and heat sources on velocity and temperature profiles, tangential stress, and heat transmission rates. Results indicate a noTable 38.4 % enhancement in heat transfer for Casson quadra hybrid nanofluid compared to Casson fluid, attributed to the synergistic properties of the nanoparticles. Thermal profiles are significantly influenced by magnetic effects, inclination, porosity, and boundary heating. The heat transmission rate in the convective region increases with higher values of the Eckert number, heat source, porous factor, and Biot number. Conversely, it decreases as the Casson parameter, Reynolds number, and velocity ratio parameter rise. This study highlights the potential of Casson quadra hybrid nanofluids in improving thermal performance for engineering applications. It suggests future optimization opportunities by selecting suitable nanofluids, adjusting magnetic fields, and modifying system geometry, thus presenting these fluids as effective solutions for advanced heat transfer systems.