Journal
CHINESE PHYSICS B
Volume 30, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/abbbf8
Keywords
multicomponent; cavitation bubble; non-condensable gas; lattice Boltzmann method
Categories
Funding
- National Natural Science Foundation of China [11874140, 11574072]
- State Key Laboratory of Acoustics, Chinese Academy of Sciences [SKLA201913]
- National Key Research and Development Program of China [2016YFC0401600]
- Primary Research and Development Plan of Jiangsu Province, China [BE2016056]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province, China [2018B741X14, KYCX18_0552]
- Postgraduate Research & Practice Innovation Program of Changzhou Campus, Hohai University, China [17B011_10]
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The study presents a multicomponent thermal MRT LBM method to investigate the collapsing cavitation bubble, showing that the non-condensable gas inside the bubble significantly affects the pressure field, temperature field evolution, collapse velocity, and profile of the bubble. Increasing concentration of the non-condensable gas in the bubble results in more obvious differences in pressure and temperature on the wall after the second collapse.
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.
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