NUMERICAL SIMULATION OF FLOW AND HEAT TRANSFER IN A DIMPLED CHANNEL WITH A FISH-SCALE PIT

A new dimple configuration (fish-scale pit) is proposed here. Numerical simulations of steady compressible flow were performed to determine the turbulent flow behavior and heat transfer capability in a dimpled channel with the fish-scale pit or spherical pit. The results show that the wall heat transfer coefficient of the surface with the fish-scale pit is higher than that with the spherical pit, and the surface with the fish-scale pit is better in terms of reducing friction drag. This indicates the prospective applications of surfaces with the fish-scale pits, which can enhance wall heat-transfer and reduce skin-friction drag.