A comparative study on pulsating flow of Au + SWCNT/blood and Au + MWCNT/blood based Jeffrey hybrid nanofluid in a vertical porous channel with entropy generation

Abstract

In the present exploration, entropy production on hydromagnetic pulsating flow of Au + SWCNT/blood and Au + MWCNT/blood-based Jeffrey hybrid nanofluid in a vertical porous channel with Cattaneo-Christov theory has been inspected. The impacts of Ohmic heating, viscous dissipation, and thermal radiation are considered. The transformation of the governing partial differential equations into a system of ordinary differential equations is made by applying the perturbation method and then numerically solved by the fourth-order Runge-Kutta method aided by bvp4c shooting technique built-in MATLAB software. The effects of various emerging parameters and variables on velocity, temperature, entropy generation, and the Bejan number are displayed through graphs. The consequences of physical parameters on heat transfer rate are prearranged in a table. This analysis demonstrates that the velocity of both hybrid nanofluids is intensified with an upsurge in the Grashof number, while it is decreasing by giving higher values in an applied magnetic field. The temperature of both hybrid nanofluids increases with an increment in the radiation parameter, and Eckert number. The entropy generation is an increasing function of Eckert number and radiation parameter. The heat transfer rate has a higher impact in the case of (Au + MWCNT/blood) hybrid nanofluid as compared to (Au + SWCNT/blood) hybrid nanofluid and mono nanofluid.