The non-linear response of bubble clouds to pressure excitations

9th International Symposium on Cavitation

Fuster, D.^1 ; Bergamasco, L.^1

CNRS-UPMC (UMR 7190), Universite Pierre et Marie Curie, 4 Place Jussieu, Paris

75005, France^1

关键词: Acoustic pulse;    Bubble curtain;    Excitation amplitudes;    Maximum pressure;    Non-linear response;    Polydisperses;    Pressure excitation;    Pressure pulse;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012123/pdf
DOI  :  10.1088/1742-6596/656/1/012123

来源: IOP

【 摘 要 】

In this article we numerically investigate the non-linear response of a bubble cloud against a periodic pressure excitation. By exciting a planar bubble curtain with an external acoustic pulse of given amplitude and frequency, we characterize the global dynamic response of the system using phase diagrams representing the void fraction against the excitation pressure. Even in the absence of mass transfer, the void fraction around which the system oscillates increases when increasing the excitation amplitude. We show how the maximum pressures reached during the collapse of bubbles are higher in polydisperse bubble clouds than in monodisperse clouds for strong pressure pulses.