キャビテーション初生における蒸気泡の膨張・収縮に及ぼす並進運動の影響

抄録

Effects of the translational motion of a vapor bubble on its cavitation inception is numerically investigated on the basis of bubble dynamics in which nonequilibrium evaporation or condensation at the bubble wall is accurately considered on a molecular level. The bubble dynamics is applied to the problem that a vapor bubble nucleus formed at a separation point on a circular cylinder surface expands there, then detaches, and moves downstream in the high-speed water flow. The locus of the moving vapor bubble after the detachment is traced, and infinite growth condition of the bubble, i.e., inception condition, investigated in detail.