Effect of nanoparticle shape on unsteady liquid film flow of MHD Oldroyd-B ferrofluid

Abstract

A computational framework is carried out to investigate the drive, and thermal transport of the thin-film flow of unstable magnetohydrodynamic (MHD) Oldroyd-B ferrofluid suspend with cobalt ferrite (CoFe2O4) nanoparticles in water. The governing PDEs of the flow are transmuted as ODEs by applicable similarity conversions and resolved using R-K and Newton’s approaches. We examined the variations in the drive and energy field designations along with the local Nusselt number influenced by the relevant non-dimensional parameters. The results are explored for different nanoparticle shapes (spherical, cylindrical, and laminar) and originate that the energy transport efficiency is advanced in spherical shaped ferrous particles when compared to tube and laminar shaped particles. The Deborah number and unsteadiness parameter has the power to regulate the Nusselt number.

Keywords

• MHD
• Oldroyd-B fluid
• Ferrofluid
• Film flow
• Shape of nanoparticles