• 2026-06-17
• Lawal M.O, Ajadi S.O, Adenegan K.E
• Volume 8, Issue 1

Abstract

This study investigates unsteady magnetohydrodynamic (MHD) flow of a Casson fluid over a stretching sheet incorporating Hall current and chemical reaction effects. The governing nonlinear partial differential equations are transformed into a system of ordinary differential equations using similarity transformations. A Richardson-extrapolated midpoint scheme is developed to obtain highly accurate numerical solutions. The influence of key parameters such as magnetic field, Hall current, Casson parameter, and chemical reaction on velocity, temperature, and concentration profiles is analyzed. Results reveal that Hall current significantly enhances both axial and transverse velocities, while magnetic effects suppress momentum transport. The proposed numerical approach demonstrates improved stability and accuracy compared to conventional schemes. These findings provide deeper insight into non-Newtonian transport processes relevant to industrial and engineering applications.

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