Control of Flow Separation and Cavitation for a Circular Cylinder at High Reynolds Numbers by Sectoral Hydrophobic Coatings
摘要
This study investigates the efficacy of hydrophobic coatings in controlling flow separation and turbulence in high Reynolds number flows (Re = 2.2 × 105). Results show that sectoral coating by a hydrophobic fluoropolymer effectively controls the turbulent wake behind a cylinder by delaying flow separation on one side (Lebedev in Phys Fluids 33, [1]). This delay causes the trajectory of large-scale vortex structures to shift. The properties of the coatings remained consistent even after many hours of continuous facility operation.