Electronic cooling technology with use of turbulent impinging jets

An investigation on cooling of the solid surface was performed by studying the behaviors of impinging jets onto a fixed flat plate. The flow and local heat transfer coefficient distributions on a plate with a constant heat source were numerically investigated with a normally impinging axisymmetric jet. Numerical predictions of the mean velocities across the jet were. made with several different nozzle-to-plate stand-off distances were considered. The two-dimensional cylindrical Navier-Stokes equations were solved using a two-equation turbulence model of the k-epsilon model version. The finite-volume differencing (FVD) scheme was used to solve the thermal and flow fields. The predicted velocities and heat transfer coefficients were compared with previously obtained experimental measurements. A universal function based on the wave equation was developed and applied to the heat transfer model to improve calculated local heat transfer coefficients. Predictions by the present model show good agreement with the experimental data.