Heat transfer effects of hybrid ferrite oxide nanoparticles in the microchannel

Nanofluid technology is one of the latest technics aims to enhance the heat exchangers working systems. The last technological developments in the mechanical and electrical systems made a reference to the necessity of increasing heat transfer of thermal systems. The nanofluid is used because it has better thermal performance properties than common fluids like water, tin oxide (SnO2) and ferrite oxide (Fe2O3) are used due to their availability and low cost for manufacturing. This research carries out experimental investigation by preparing a hybrid ferrite oxide with tin oxide at 0%, 5%, 10% and 15% concentration nanosized powder and studying its synthesis, structural, optical, morphological, and thermal measurements. The numerical simulation has been made of 2-D turbulent mixed convection fluid flow in flat, face step and radial corrugated microchannels. This study has studied the hybrid ferrite oxide with tin oxide at 0%, 5% and 15% with ethylene glycol as base fluid, with 1%–5% of volume concentrations at 4000, 5000, 6000 and 7000Re. The outcomes reveal that the Nusselt number increased with the increase of volume concentration and Reynolds number. The pressure drops increase with the increase in volume concentration and Reynolds number. Furthermore, the skin friction coefficient decreases with the increase in Reynolds number. The radial corrugated microchannel got the highest Nusselt number, pressure drop, and skin friction coefficient, followed by the face step and then flat microchannels. 15Sn85Fe2O3 hybrid nanofluid suspended in ethylene glycol at 5% volume concentration got the highest Nusselt number, pressure drop, and skin friction coefficient, followed by 5Sn95Fe2O3 hybrid nanofluid, then the ferrite oxide Fe2O3. Performance evaluation criteria (PEC) studied the heat transfer in all study steps and found that the 15Sn85Fe2O3 hybrid nanofluid in ethylene glycol at 5% volume concentration in radial corrugated microchannel increased 104% compared with ethylene glycol in the flat microchannel. The performance evaluation criteria value has increased by 82% from flat microchannel to radial microchannel at 5% of volume concentration of 15Sn85Fe2O3 hybrid nanofluid.

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