Study on the Law of Pseudo-Cavitation on Superhydrophobic Surface in Turbulent Flow Field of Backward-Facing Step

Superhydrophobic surface is regarded as important topic in the field of thermal fluids today due to its unique features on flow drag reduction and heat transfer enhancement. In this study, pseudo-cavitation phenomenon superhydrophobic backward-facing step turbulent observed through experiments. The underlying reason for studied with experimental observation analysis, time variant mechanisms various Reynolds number summarized. research results indicate that provide material basis dynamic condition generation pseudo-cavitation. induces a large bubble below step. size, position, shape, oscillation amplitude, detachment, splitting show regularity changes number. Meanwhile, growth, oscillation, split, regeneration over also regularity. study development laws can be used better control perturbation field. Importantly, present has meaning understanding gas coverage under step, paving way studying effect surface.