Variable magnetic forces impact on magnetizable hybrid nanofluid heat transfer through a circular cavity

This research deals with the analysis of magnetizable hybrid nanofluid of MWCNT-Fe3O4/H2O inside a circular cavity with two circular heaters. A wire carrying electrical current has been located in the center of each heater. The magnetic fields strengths created by the wires carrying electrical current are not the same. The governing parameters studied includes Rayleigh number (Ra = 10(4)to10(6)), location angle of heaters alpha = 0-pi/2, the magnetic strengths ratio parameter gamma(r) = 0.2-5, magnetic number Mn-f = 0-1000, Hartmann number Ha = 0-50, nano composite particles concentration phi = 0-03%. Results demonstrate that dispersing the hybrid nanoparticles of MWCNT-Fe3O4 inside the host fluid augments the convective heat transfer. (C) 2018 Elsevier B.V. All rights reserved.