Investigation on three dimensional squeezing flow of mixture base fluid (ethylene glycol-water) suspended by hybrid nanoparticle (Fe3O4-Ag) dependent on shape factor

In this paper, three dimensional squeezing flows and heat transfer of (Fe3O4)-Ag/ethylene glycol-water hybrid nanoparticles inside a rotating channel with a fixed and impermeable bottom walls in the presence of thermal radiation has been investigated and analyzed. It should be noted that the hybrid base fluid consists of 50% water and 50% ethylene glycol. PDEs governing the problem have been solved after converting to ODEs using numerical method. The effect of different parameters variations on velocity and temperature profiles and also on skin friction coefficient and local Nusselt number are shown in graphs for two modes of increasing and decreasing channel height for three shape factor of nanoparticles such as, Bricks, cylinders and platelets. Increasing velocity profile due to the decrease in channel height, reducing the temperature profile and increasing heat transfer rate due to the increase in shape factors, the greater effect of hybrid nanofluid in comparison with nanofluid on reducing temperature due to the large difference in the thermal conductivity of two nanoparticles and the greater local Nusselt number in the top wall of the channel for hybrid nanoparticles compared to the nanoparticle is the most important results. (C) 2018 Elsevier B.V. All rights reserved.