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

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. (C) 2020 The Authors. Published by Elsevier B.V. on behalf of Faculty of Engineering, Ain Shams University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-ncnd/4.0/).

Automated summary

A computational framework was used to study the drive and thermal transport of unstable MHD Oldroyd-B ferrofluid flow with CoFe2O4 nanoparticles in water. Results showed that spherical ferrous particles have higher energy transport efficiency compared to tube and laminar shaped particles, and the Nusselt number can be regulated by the Deborah number and unsteadiness parameter.