Dynamics of a Bubble Cloud near a Rigid Wall

9th International Symposium on Cavitation

Ma, J.^1 ; Hsiao, C.-T.^1 ; Chahine, G.L.^1

DYNAFLOW, INC., 10621-J Iron-Bridge Road, Jesssup

MD

20794, United States^1

关键词: Bubble behavior;    Bubble dynamics;    Interacting bubbles;    Orders of magnitude;    Pressure amplitudes;    Resonance frequencies;    Sinusoidal driving;    Small-amplitude oscillations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012153/pdf
DOI  :  10.1088/1742-6596/656/1/012153

来源: IOP

【 摘 要 】

Simulations involving a large number of interacting bubbles in a bubble cloud are conducted to assess the effect of frequency and amplitude of a sinusoidal driving pressure on the bubble cloud behavior. As the pressure amplitude increases strong nonlinear bubble dynamics become more pronounced and higher pressures are generated at the wall. A resonance frequency, corresponding to the highest collective bubble behavior, results in a pressure peak orders of magnitudes higher than the excitation pressure. This frequency is significantly different from the natural frequency of a spherical cloud executing small amplitude oscillations.