Numerical investigation of combined effect of nanofluids and multiple impinging jets on heat transfer

The present study is focused on numerical investigation of heat enhancement and fluid flow from a heated surface by using nanofluids with three impinging jets. Effects of different volume ratio, different heat flux and different types of nanofluids (CuO-water, Al₂O₃-water, Cu-water, TiO-water and pure water) on heat transfer and fluid flow were studied numerically. CuO-water nanofluid was used as a coolant in the other parameter. Three impinging jets were used to cool the surface. Low Re k-e turbulent model of PHONEICS computational fluid dynamics code was used for numerical analysis. It is obtained that increasing volume ratio from ψ=2% to 8% causes an increase of 10.4% on average Nusselt Number. Increasing heat flux six times has not a significant effect on average Nusselt number. Using Cu-water nanofluid causes an increase of 2.2%, 5.1%, 4.6% and 9.6% on average Nusselt number with respect to CuO-water, TiO-water, Al₂O₃-water and pure water.