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

• Published in: The European physical journal. ST, Special topics Vol. 230; no. 5; pp. 1227 - 1237
• Main Authors: Naveen Kumar, R., Gowda, R. J. Punith, Gireesha, B. J., Prasannakumara, B. C.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-07-2021; Springer Nature B.V
• Subjects: Atomic; Classical and Continuum Physics; Computational fluid dynamics; Concentration gradient; Condensed Matter Physics; Ethylene glycol; Fluid flow; Graphene; Graphs; Materials Science; Measurement Science and Instrumentation; Molecular; Nanofluids; Nanoparticles; Optical and Plasma Physics; Parameters; Physics; Physics and Astronomy; Porous media; Regular Article; Rotating disks; Suction; Thermal analysis; Thermodynamic properties; Titanium dioxide; Transport Properties of Non-Newtonian Nanofluids and Applications
• ISSN: 1951-6355; 1951-6401
• DOI: 10.1140/epjs/s11734-021-00054-8

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.