Dynamics of a Bubble Cloud near a Rigid Wall

[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.

[发布机构] 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