A Parametric Study of Bubble Cloud Dynamics near a Wall in an Acoustic Field
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A parametric study is conducted to investigate bubble cloud dynamics near a rigid wall when excited by a sinusoidal pressure field. It is shown that a preferred driving frequency which can incur the strongest collective bubble behavior and result in the highest pressure impact on the nearby wall exists for a given bubble cloud initial condition. Such preferred driving frequency is strongly dependent on the driving amplitude but independent on the initial ambient pressure. The preferred driving frequency decrease as the driving amplitude is increased and approaches the natural frequency of bubble cloud predicted by linear theory when the driving amplitude is very small.