Abstract
The purpose of this study is to clarify flow characteristics and drag reduction of a wettability spherical surface. A three-dimensional laminar flow past a sphere were numerically simulated by applying a new wet boundary condition for a hydrophobic surface. These results suggest that the wet boundary condition proposed in this paper is valid for the hydrophobic surface. The evolution of a gas-liquid interfaces at the hydrophobic spherical surface has been clarified. The simulation results of the hydrophobic spherical surface showed drag reduction.
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