期刊
OCEAN ENGINEERING
卷 255, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2022.111484
关键词
Bubble dynamics; Cavitation; Shock wave; Jet impact; Computational fluid dynamics
资金
- National Key R&D Program of China [2018YFC0308900]
- National Natural Science Foundation of China [51879052, 51909041]
- Heilongjiang Postdoctoral Fund [LBH-Q20016]
- National Natural Science Foundation of Heilongjiang Province [YQ2019E012]
- Fundamental Research Funds for the Central Universities [3072020CFJ0105]
Experimental and numerical simulations show good agreement in the dynamics of cavitation bubbles near a rigid wall. The study quantitatively analyzes the influence of the stand-off parameter on the bubble-induced pressure, force, and impulse on the wall, providing valuable insights for cavitation- or bubble-related applications.
When a bubble collapses near a rigid wall, a localized area of high pressure is generated on the wall. In the present study, experiments are carried out to record the dynamics of cavitation bubbles near a rigid wall and the corresponding numerical simulations are performed using computational fluid dynamics. The bubble expansion, contraction, collapse, jet formation, and rebound observed in the numerical simulations are in good agreement with the experimental results. Thereafter, the influence of the stand-off parameter. on the bubble-induced pressure, force, and impulse on a rigid wall is quantitatively studied. The peak value of the initial shock wave is higher than that generated by the bubble collapse. Nevertheless, the bubble pulse and jet impact are superimposed, resulting in a much longer and stronger impulse than that of the initial shock wave. The impulse increases as. decreases in the initial shock wave stage. However, this is not the case in the bubble collapse stage. For different ranges of the pressure integration, the maximum impulse caused by the bubble collapse occurs at a moderate value of.. The findings reported in this paper provide a reference for cavitation- or bubble-related applications.
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