Non-Newtonian hybrid nanofluid flow over vertically upward/downward moving rotating disk in a Darcy-Forchheimer porous medium

Researchers and engineers working in the field of thermal analysis are pursuing new ways to improve the performance of electrical devices by improving their thermal properties. Impressed by these applications, in this paper, we examined the influence of activation energy over Darcy-Forchheimer flow of Casson fluid with suspension of Graphene oxide and Titanium dioxide nanoparticles considering 50% of Ethylene glycol as base fluid in a porous media. The problem is basically an extension of the well-known problem of von Karman's viscous pump in a situation where the disk rotates. The modelled equations are converted to ODEs using the similarity transformations. The numerical solution is obtained using the RKF-45 method by adopting shooting technique. The calculation of mass and heat transfer rate is analysed through graphs. It is observed that the upward and downward motion of the disk exerts similar effects to that of the injection/suction through the wall. The downward motion of the disk causes reduction in velocity and temperature fields. Furthermore, variation in velocity, thermal, and concentration gradients for several non-dimensional parameters are studied briefly and demonstrated with the help of graphs. The obtained result reveals that increase in Casson parameter reduces the velocity of the fluid.

Automated summary

This study explores the impact of activation energy on Casson fluid flow in porous media, as well as the application of graphene oxide and titanium dioxide nanoparticles in thermal properties. Through mathematical modeling and analysis of graphs, it was found that an increase in the Casson parameter decreases fluid velocity, and variations in velocity, thermal, and concentration gradients were examined in detail.