気泡運動に対する内部現象の影響 : 第2報, 膨張時における気泡内での輸送現象およびミスト生成の影響

概要

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The motion of a single bubble is simulated when the surrounding pressure decreases step-wisely. In this simulation, the conservation equations for mass, momentum and energy are solved directly in order to estimate the effect of internal phenomena on bubble motion. At the same time, the mist formation in the gas phase and the diffusions of heat and noncondensable gas in the liquid phase are taken into account. The numerical results for several cases reveal that nondimensional transport coefficients have large effects on the distributions of temperature, concentration of vapor and the mist formation. As the initial radius becomes smaller or depressurization ratio becomes larger, bubble motion is less influenced by mist formation due to the heat penetration through the bubble wall by heat conduction.
1992-07-25