Dynamics of film drainage between two pulsating bubbles for medical ultrasound

采用高速成像和数字图像处理技术，定量评价了超声驻波场中两个脉动气泡之间的排膜情况。实验结果与已有的理论模型进行了比较。结果表明，准静态动态模型低估了排水时间，而动力学模型高估了排水时间。我们还通过实验观察到了两个气泡的振荡平移运动，这两个气泡都大于共振尺寸

Drainage of film between two pulsating bubbles in an ultrasound standing wave field was quantitatively evaluated by using high-speed imaging and digital image processing. Experimental results on the film drainage were compared with existing theoretical models. As results, we clarified that a quasi-static dynamic model underestimates the drainage time, while a kinetic model overestimates the time. We also experimentally observed the oscillatory translational motions of two bubbles both of which are larger than resonance size