Simulation of Heat Transfer of Al2O3/Water Nanofluid- Effect Volume Fraction

N. Dukhan
University of Detroit Mercy, Michigan, United States

Poster stand number: W140

Keywords: nanofluids, heat transfer, cooling of electronics, thermal management

The literature has a considerable number of disagreements with regard to the performance of nanofluids as heat transfer fluids. In this paper, simulations of heat transfer of nanofluid made from aluminum oxide Al2O3 suspended in deionized water. Three solid particles volume concentrations were tested: 0.25, 0.75 and 1.5%. Key properties of each nanofluid were obtained from correlation available in the literature. Each nanofluid flowed in a circular pipe having an internal diameter 5.25 cm and a length 15.24 cm. The pipe was subjected to constant heat flux of 15518 W/m2. At the inlet, the fluid’s temperature was 298 °K, and entrance velocity 0.04 m/s (uniform profile). The single-phase model for each nanofluid was utilized. All simulations were conducted utilizing AANSYS Fluent. The mesh-independent results show that the total temperature increase with increasing volume concentration, and was higher that of water. As expected, the temperature increase in the flow direction. For the low concentration of 0.25%, there was negligible enhancement of heat transfer compared to water.