Chin. Phys. B, 2021, Vol. 30(2): 024701    DOI: 10.1088/1674-1056/abbbf8
 ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next

# Effect of non-condensable gas on a collapsing cavitation bubble near solid wall investigated by multicomponent thermal MRT-LBM

Yu Yang(杨雨)1, 2, Ming-Lei Shan(单鸣雷)1,†, Qing-Bang Han(韩庆邦)1, and Xue-Fen Kan(阚雪芬)1
1 Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology, Hohai University, Changzhou 213022, China; 2 College of Computer and Information, Hohai University, Nanjing 210000, China
Abstract  A multicomponent thermal multi-relaxation-time (MRT) lattice Boltzmann method (LBM) is presented to study collapsing cavitation bubble. The simulation results satisfy Laplace law and the adiabatic law, and are consistent with the numerical solution of the Rayleigh-Plesset equation. To study the effects of the non-condensable gas inside bubble on collapsing cavitation bubble, a numerical model of single spherical bubble near a solid wall is established. The temperature and pressure evolution of the two-component two-phase flow are well captured. In addition, the collapse process of the cavitation bubble is discussed elaborately by setting the volume fractions of the gas and vapor to be the only variables. The results show that the non-condensable gas in the bubble significantly affects the pressure field, temperature field evolution, collapse velocity, and profile of the bubble. The distinction of the pressure and temperature on the wall after the second collapse becomes more obvious as the non-condensable gas concentration increases.
Keywords:  multicomponent      cavitation bubble      non-condensable gas      lattice Boltzmann method
Published:  26 January 2021
 PACS: 47.11.Qr (Lattice gas) 47.55.Ca (Gas/liquid flows) 47.55.dd (Bubble dynamics) 47.55.dp (Cavitation and boiling)
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11874140 and 11574072), the State Key Laboratory of Acoustics, Chinese Academy of Sciences (Grant No. SKLA201913), the National Key Research and Development Program of China (Grant No. 2016YFC0401600), the Primary Research and Development Plan of Jiangsu Province, China (Grant No. BE2016056), the Postgraduate Research & Practice Innovation Program of Jiangsu Province, China (Grant Nos. 2018B741X14 and KYCX18_0552), and the Postgraduate Research & Practice Innovation Program of Changzhou Campus, Hohai University, China (Grant No. 17B011_10).
Corresponding Authors:  Corresponding author. E-mail: shanming2003@126.com