Non-Newtonian hybrid nanofluid flow over vertically upward/downward moving rotating disk in a Darcy–Forchheimer porous medium
Department of Studies and Research in Mathematics, Davangere University, Davangere, Karnataka, India
2 Department of Mathematics, Kuvempu University, Jnana Sahyadri, 577 451, Shimoga, India
Accepted: 31 January 2021
Published online: 19 April 2021
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.
© The Author(s), under exclusive licence to EDP Sciences, Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021