Numerical investigation of thermally developed MHD flow with pulsation in a channel with multiple constrictions

This article concerns heat transfer analysis in pulsating flow a channel with walls having multiple symmetric constrictions. The is influenced by Lorentz force and thermal radiation. unsteady governing equations, simplified for low conducting fluids, are solved the finite difference method using stream–vorticity function formulation. effects of emerging parameters, including magnetic field parameter (Hartman number), Reynolds number, Prandtl radiation on various profiles, studied. profiles dimensionless axial velocity, temperature, wall shear stress (WSS), skin friction coefficient, local Nusselt number discussed graphically. examined at prominent locations time instants pulse cycle. WSS has direct relation Hartmann Strouhal numbers. generated first constriction higher than that second constriction. increases an increase accelerating phase decreases decelerating both temperature Hartman numbers constricted portion channel. directly affects inversely part However, general, exhibit irregular patterns downstream encountered bump next bumps.