平面および曲面剛体壁近くでの単一気泡の崩壊運動

概要

論文の詳細を見る
Collapse motion of a single gas bubble near a plane or curved rigid wall is theoretically investigated. Equations of the motion of a nonspherical gas bubble near the plane rigid wall are obtained taking into account the translational motion and the deformation of the bubble. These equations are exact to order (R*_<00>/L*_0)^5, in which R*_<00> is the initial radius of the bubble and L*_0 the distance between the center of the bubble and the rigid wall. The numerical result of the bubble shapes is compared with that obtained by a fully numerical method and is found to be in good agreement with it. It is shown that there exists a high pressure region in the liquid behind the bubble moving toward the wall and that it causes the occurrence of a jet. Equations of a spherical gas bubble near a curved rigid wall are also derived. It is shown that the larger the curvature of the wall is, the higher the pressure at the center of the wall becomes. This indicates that the damage of the wall becomes more intensive with the increase of the curvature.
一般社団法人日本機械学会の論文
1989-09-25