Activity of Motile Microorganisms in Radiative Heat Transfer Analysis of Chemically Reactive Flow Between Stretching Upper and Rotating Lower Disks

ABSTRACT The fluid flow between two parallel disks subjected to a low‐oscillating magnetic field has important applications in magnetohydrodynamic systems, where controlling the flow of electrically conducting fluid is essential. This setup is used in cooling systems for advanced electronics and nuclear reactors, where precise thermal management is required. In view of this, the current investigation explores the effect of a low‐oscillating magnetic field on the liquid flow with bio‐convection and moving motile microorganisms between two parallel disks. It is expected that the lower disk is rotating, while the upper disk is stretching. Additionally, the consequence of non‐uniform heat source/sink, non‐linear thermal radiation, and chemical reaction on the fluid flow is considered in the analysis. The current issue's governing partial differential equations (PDEs) are transformed into dimensionless ordinary differential equations (ODEs) using appropriate similarity variables. The resultant ODEs are numerically solved using Runge Kutta Fehlberg's fourth‐fifth order (RKF‐45) approach. The significance of several parameters on the various profiles is depicted with graphic illustrations. The results indicate that higher solid volume fraction and effective magnetization parameter enhance radial velocity while reducing tangential velocity. The thermal profile intensifies with the improvement of radiation and heat source/sink parameters. The microorganism profile drops with the increase in values of Lewis and Peclet numbers.