Augmented forced convection around a heated flat plate

Both numerical and experimental investigations are made of the factors responsible for the augmented rate of heat transfer from plates with separating and reattaching flow. An acoustic field is applied to lock the rate of vortex shedding from the separation bubble and reduce the mean reattachment length. The mean heat transfer rate results of the numerical experiments are found to be consistent with those obtained in previous physical experiments. Furthermore, comparisons of instantaneous streamlines and isotherms predicted by the model clearly show the augmentation of the heat transfer in the region of the shed vortices. Interpretation is made of the increased heat transfer rate at reattachment, observed both in the present model and previous physical experiments, as the bubble is shortened. (Edited author abstract. )