Pulsating electrically conducting flow of Au/SWCNTs-blood micropolar nanofluid in a porous channel with Ohmic heating, thermal radiation

Abstract

The present article addresses the pulsating hydromagnetic flow of a micropolar nanofluid in a porous channel with the existence of thermal radiation and Joule heating (Ohmic heating). Micropolar fluid is considered as blood (base-fluid) and Au(gold)/SWCNTs(single-walled carbon nanotube) are taken as nanoparticles. The fluid is injected into the channel along with a constant velocity from the bottom wall and is squeezed out at the same rate from the top wall. The perturbation approach can be used to change the governing partial differential equations (PDEs) into ordinary differential equations (ODEs), and are subsequently solved by employing the shooting technique with the help of the Runge-Kutta fourth-order scheme. The flow variables like velocity, microrotation, and temperature of nanofluid are graphically depicted and discussed in detail for different values of physical parameters. The heat transfer rate is calculated and displayed through a table. The comparative results for Au and SWCNTs with blood as base fluid are simulated. Such findings bring out that the velocity of nanofluid decreases over an enhancement of coupling parameter, volume fraction of nanoparticles, and Hartmann number. The temperature of nanofluid is increasing with the rising values of Eckert number, Hartmann number, and radiation parameter while it is reducing with an enhancement of coupling parameter, volume fraction of nanoparticles, and cross-flow Reynolds number. Further, the results revealed that the Nusselt number is increasing with rising values of the radiation parameter and Eckert number.