Effect of supercritical water shell on cavitation bubble dynamics

doi:10.1088/1674-1056/24/5/054701

中国物理B ›› 2015, Vol. 24 ›› Issue (5): 54701-054701.doi: 10.1088/1674-1056/24/5/054701

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Effect of supercritical water shell on cavitation bubble dynamics

邵纬航, 陈伟中

The Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China

收稿日期:2014-09-13 修回日期:2014-10-27 出版日期:2015-05-05 发布日期:2015-05-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174145 and 11334005).

Effect of supercritical water shell on cavitation bubble dynamics

Shao Wei-Hang (邵纬航), Chen Wei-Zhong (陈伟中)

The Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China

Received:2014-09-13 Revised:2014-10-27 Online:2015-05-05 Published:2015-05-05
Contact: Chen Wei-Zhong E-mail:wzchen@nju.edu.cn
About author:47.55.dd; 43.35.Ei; 43.25.Yw
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174145 and 11334005).

摘要/Abstract

摘要： Based on reported experimental data, a new model for single cavitation bubble dynamics is proposed considering a supercritical water (SCW) shell surrounding the bubble. Theoretical investigations show that the SCW shell apparently slows down the oscillation of the bubble and cools the gas temperature inside the collapsing bubble. Furthermore, the model is simplified to a Rayleigh–Plesset-like equation for a thin SCW shell. The dependence of the bubble dynamics on the thickness and density of the SCW shell is studied. The results show the bubble dynamics depends on the thickness but is insensitive to the density of the SCW shell. The thicker the SCW shell is, the smaller are the wall velocity and the gas temperature in the bubble. In the authors' opinion, the SCW shell works as a buffering agent. In collapsing, it is compressed to absorb a good deal of the work transformed into the bubble internal energy during bubble collapse so that it weakens the bubble oscillations.

关键词: supercritical water shell, bubble dynamics

Abstract: Based on reported experimental data, a new model for single cavitation bubble dynamics is proposed considering a supercritical water (SCW) shell surrounding the bubble. Theoretical investigations show that the SCW shell apparently slows down the oscillation of the bubble and cools the gas temperature inside the collapsing bubble. Furthermore, the model is simplified to a Rayleigh–Plesset-like equation for a thin SCW shell. The dependence of the bubble dynamics on the thickness and density of the SCW shell is studied. The results show the bubble dynamics depends on the thickness but is insensitive to the density of the SCW shell. The thicker the SCW shell is, the smaller are the wall velocity and the gas temperature in the bubble. In the authors' opinion, the SCW shell works as a buffering agent. In collapsing, it is compressed to absorb a good deal of the work transformed into the bubble internal energy during bubble collapse so that it weakens the bubble oscillations.

Key words: supercritical water shell, bubble dynamics

中图分类号: (Bubble dynamics)

47.55.dd

43.35.Ei (Acoustic cavitation in liquids) 43.25.Yw (Nonlinear acoustics of bubbly liquids)

邵纬航, 陈伟中. Effect of supercritical water shell on cavitation bubble dynamics[J]. 中国物理B, 2015, 24(5): 54701-054701.

Shao Wei-Hang (邵纬航), Chen Wei-Zhong (陈伟中). Effect of supercritical water shell on cavitation bubble dynamics[J]. Chin. Phys. B, 2015, 24(5): 54701-054701.

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Effect of supercritical water shell on cavitation bubble dynamics

Effect of supercritical water shell on cavitation bubble dynamics

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