文献类型：期刊文献

英文题名：Dynamics of a single free-settling spherical particle driven by a laser-induced bubble near a rigid boundary

作者：Wu, Shengji[1,2];Li, Bo[3,4];Zuo, Zhigang[1,2];Liu, Shuhong[1,2]

第一作者：Wu, Shengji

通讯作者：Zuo, ZG[1];Liu, SH[1];Zuo, ZG[2];Liu, SH[2]

机构：[1]Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China;[2]Tsinghua Univ, Dept Energy & Power Engn, Beijing 100084, Peoples R China;[3]Zhejiang Univ, State Key Lab Fluid Power & Mechatron Syst, Hangzhou 310027, Peoples R China;[4]Beijing Union Univ, Coll Robot, Beijing 100020, Peoples R China

第一机构：Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China

通讯机构：[1]corresponding author), Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China;[2]corresponding author), Tsinghua Univ, Dept Energy & Power Engn, Beijing 100084, Peoples R China.

年份：2021

卷号：6

期号：9

外文期刊名：PHYSICAL REVIEW FLUIDS

收录：;EI(收录号：20213710888572);Scopus(收录号：2-s2.0-85114686771);WOS:【SCI-EXPANDED(收录号:WOS:000692793100001)】；

基金：The authors gratefully acknowledge the guidance and insightful suggestions from Howard A. Stone. We further thank the original simulation code from Qingyun Zeng and Claus-Dieter Ohl, and the inspiring discussions with Chao Sun. The work was supported by the National Natural Science Foundation of China (No. 51876100, No. 52076120, and No. 52079066), the State Key Laboratory of Hydroscience and Engineering (No. sklhse-2019-E-02), and the State Key Laboratory of Fluid Power and Mechatronic Systems (No. GZKF-201909).

语种：英文

外文关键词：Controlled drug delivery - Erosion - Laser produced plasmas - Surface cleaning

摘要：In view of the mechanism of the enhanced cavitation erosion of hydraulic machinery operating in sand-laden water, we carry out a systematic investigation on the interaction between a laser-induced cavitation bubble and a free-settling spherical particle near a rigid boundary. We document different types of particle-bubble interactions and experimentally discover two important phenomena where the particle ends up impacting on the boundary at a relatively high velocity, driven by the explosive growth of the bubble and the microjet of the nonspherical bubble collapse respectively. By combining numerical and analytical analyses with experiments, we identify two limiting conditions of the particle-bubble bounce and the particle-boundary impact respectively in terms of the initial relative distance between the particle and the bubble, and the stand-off distance of the bubble against the boundary. These results provide guidance in controlling the particle-bubble dynamics in applications, such as alleviating cavitation erosions in sand-laden water, improving the efficiency of surface cleaning and drug delivery by cavitation and other means.