抄録
The bubble departure mechanism, which in general is dominated by the buoyancy force, has been shifted to the surface tension force dominance by employing a two-dimensional saw-tooth surface. The experiment was conducted in a carbonated water pool, and spontaneously generated and detached bubbles on test walls were visualized. Consequently, three different bubble departure modes (spontaneous, double contact, and top contact) were observed, and bubble growth and departure mechanisms were analyzed in terms of instantaneous bubble diameter and surface geometry. The results showed that bubbles departed from the surface in double contact mode shaped almost perfectly spherical, which implies the departure mechanism was surface tension force dominant.