気泡運動に対する内部現象の影響 : 第1報, 気泡崩壊時における熱拡散, 気液界面での蒸発, 凝縮および相互拡散の影響

抄録

The motion of a single bubble is simulated directly using the full conservation equations for mass, momentum and energy when the surrounding pressure increases stepwise. The numerical results for several cases reveal that considerable distributions of temperature and concentration of vapor are formed inside the bubble, and the heat and mass transfer inside bubble have much influence on the bubble motion. The heat transfer on the bubble wall which is mainly governed by the temperature gradient causes the thermal damping of the bubble motion. This damping behavior is influenced by the initial bubble radius. The mass transfer on the bubble wall, which is influenced by the diffusion phenomena between vapor and noncondensable gas, also has a great effect on the bubble motion.