Ding, Q.; Li, X.; Cui, Y.; Lv, J.; Shan, Y.; Liu, Y. Study on Non-Spherical Deformation Velocity of a Single Cavitation Bubble. Processes2024, 12, 553.
Ding, Q.; Li, X.; Cui, Y.; Lv, J.; Shan, Y.; Liu, Y. Study on Non-Spherical Deformation Velocity of a Single Cavitation Bubble. Processes 2024, 12, 553.
Ding, Q.; Li, X.; Cui, Y.; Lv, J.; Shan, Y.; Liu, Y. Study on Non-Spherical Deformation Velocity of a Single Cavitation Bubble. Processes2024, 12, 553.
Ding, Q.; Li, X.; Cui, Y.; Lv, J.; Shan, Y.; Liu, Y. Study on Non-Spherical Deformation Velocity of a Single Cavitation Bubble. Processes 2024, 12, 553.
Abstract
Cavitation bubbles are commonly existing in shipbuilding engineering, ocean engineering, mechanical engineering, chemical industry, and aerospace. Asymmetric deformation of bubble occurs near the boundary, and the non-spherical cavitation bubbles have strong destructive effects, inducing high amplitude loading at the nearby boundary. The purpose of this paper is to investigate the laser-induced of cavitation bubble, non-spherical collapse behavior near the boundary. In this study, experimental data such as bubble pulsation process and bubble surface velocity distribution were obtained by high-speed camera technique and full-field velocity calculation. The results show that the bubble appeared non-spherical collapse shapes, near different boundaries, with near-hemispherical, near-ellipsoidal, near-cone and near-pea shapes, and the bubble surface velocity distribution is not uniform. When bubble near the free surface or rigid boundary, the smaller the stand-off r is, the more obvious the repulsive effect of the free surface and the attractive effect of the rigid boundary are. As the stand-off r decreases, the larger the Bjerknes force and the bubble surface velocity difference, the more pronounced the non-spherical shape.
Copyright:
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