Numerical study of pressure loads generated by a shock-induced bubble collapse

被引:15
作者
da Silva, Eric Goncalves [1 ]
Parnaudeau, Philippe [1 ]
机构
[1] ISAE ENSMA, Inst Pprime, PP 3346 CNRS, 1 Ave Clement Ader, F-86961 Futuroscope, France
关键词
CAVITATION EROSION; SIMULATION; CAVITY; FLOWS; INTERFACES; IMPACT; MODEL; WAVES;
D O I
10.1063/5.0069332
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
This paper presents a numerical study of the strong loads caused by the collapse of an air bubble immersed in water in the vicinity of a wall and impacted by a normal shock wave. Simulations are performed using an efficient parallel fully compressible two-phase solver based on a homogeneous mixture model. Different configurations are investigated by varying the distance of the initial bubble to the wall. Comparisons are done with exiting results and with two-dimensional simulations highlighting large discrepancies on the computed pressure peaks. The computations show that the stand-off distance has significant effects on the collapse dynamics and the maximum wall pressure leading to potential wall damage. A power-law is proposed for the evolution of the maximum pressure peak as a function of the stand-off distance. Finally, a twin-bubble collapse is computed illustrating collective effects and the amplification of pressure peak at the wall.
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页数:20
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