Newtonian heating effect in pulsating magnetohydrodynamic nanofluid flow through a constricted channel: A numerical study

This article investigates the pulsatile flow of viscous incompressible MHD nanofluid in a rectangular channel. At upper and lower walls, channel has symmetrical constrictions. The goal is to analyze heat transfer features under effect magnetic field thermal radiation. Five different nanofluids, formed with nanoparticles copper (Cu) , magnetite id="m2">(Fe3O4) silver id="m3">(Ag) titanium oxide id="m4">(TiO2) single wall carbon nanotube id="m5">(SWCNT) base fluid water, are considered study. unsteady governing equations transformed using vorticity-stream function approach. solution obtained finite difference technique (FDM). various controlling parameters on velocity, temperature, Nusselt, skin-friction profiles inspected by graphs. Across channel, graphs vorticity, streamlines, temperature distribution also displayed. thickness boundary layer upsurges escalating values field, radiation parameters, solid volume fraction, whereas it declines Strouhal Prandtl numbers. usually found have more regular pattern upstream constriction than that downstream constriction. throat constriction, nanotube-based attains higher temperatures other nanofluids However, lee silver-based behavior, most cases, opposite findings study can be utilized cure stenosis blood vessels, design biomechanical devices, employ pulsation control industrial operations.