Steady State Jet Impingement Heat Transfer from Axisymmetric Plates with and without Grooves

The present work is a numerical investigation which examines the effects of geometric parameters on the axisymmetric jet impingement heat transfer. Two cases are considered such as flat plate, and grooved plate. Nozzle diameter (d) of 2 cm is fixed as constant, nozzle-to-plate spacing (H) of 4cm is used for validation and 8cm for all the other simulations. The jet flow is in the range of fully turbulent flow with Reynolds number of 23,000. Grid independent study reveals each model has its own style of dependency. Validation of the turbulence model for H/d=2 shows secondary peak at exact location. Results about effect of grooves are discussed in detail based on the surface Nusselt number and averaged Nusselt number.