关键词: 空泡;壁面;雷诺数;接触角;变形

Abstract: Bubble lying on the wall can reduce resistance between liquid and wall, which is related to the dynamic characteristics of bubble closing to a wall. In terms of Reynolds number and surface property of material, property of a single bubble interacting with a wall is researched, and analyzing the effect of Reynolds number and surface property on the dynamic characteristics of bubble by changing the speed, viscosity, volume of bubble and the contact angle of surface. The results show that the lager Reynolds number could lead to a more serious deformation of bubble with the same viscosity. Impact between bubble and wall will become stronger as the increase of volume of bubble. Another, the maximum deformation of bubble will increase with the raise of viscosity, while it could reach balance faster. Except that, both of higher speed of bubble closed to wall and lager volume could lead to a more serious deformation and take more time to reach balance. The deformation of bubble decreases with contact angle increasing. The deformation of bubble decreases significantly until surface reaching the superhydrophobic state.

Key words: bubble;wall;Reynolds number;contact angle;deformation