Numerical Investigation of Heat Transfer Enhancement in Confined Slot-Jet Impingement on a hot plate using AL2O3-Water Nanofluid

Heat transfer enhancement from a hot plate due to confined slot-jet impingement using AL2O3-Water nanofluid as coolant is investigated numerically. The flow is considered to be two-dimensional, steady state, turbulent, and incompressible. Turbulent fluctuations in the velocity field are modeled using the Reynolds Averaged Navier-Stokes methodology, using three versions of k-ε models. The results show that the standard k-ε turbulence model with enhanced wall treatment accords to the experimental data better than other models. Different geometric ratios and particle volume fractions of the nanofluid and jet Reynolds numbers have been considered to study the behavior of the system in terms of average and local Nusselt number and convective heat transfer coefficient on the impingement plate, temperature fields, stream function and velocity magnitude contours. The dimensionless profiles show that the average Nusselt number and wall shear stress on the impingement plate increase by increasing particle volume fraction of the nanofluid and jet Reynolds number.

کلیدواژه ها:

Nanofluid ، Turbulence Modeling ، Impinging Jet ، Particle Volume Fraction ، Jet Reynolds Number ، Nusselt Number