超声波作用下气泡间的相互作用力  

The forces of interaction between bubbles in an ultrasonic field

作　　者：王成会[1,2] 胡静[1] 莫润阳[1] 

机构地区：[1]陕西师范大学应用声学研究所,陕西西安710062 [2]南京大学声学研究所,江苏南京210093

出　　处：《陕西师范大学学报（自然科学版）》2011年第3期27-31,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(10974127);陕西省自然科学基金资助项目(2010JQ1006)

摘　　要：考虑邻近振荡气泡的声辐射对气泡动力学行为的影响,得到了气泡间的相互作用力的表达式.通过数值分析,发现尺寸相同的气泡之间具有引力作用,尺寸不同气泡之间的相互作用力的相位随时间发生变化,引力和斥力交替出现.利用高速摄影系统观察了换能器在自来水中形成的气泡分布.当振荡的局部泡群运动到声压相对较弱区域时,将有单个气泡从泡群表面凹陷处逸出,表明该位置附近气泡之间主要表现为相互排斥.尺寸几乎相同的气泡间则相互吸引.The acoustic radiation of the bubbles is considered in the equation of bubble dynamics,and the forces of interaction between oscillating bubbles are researched theoretically.The numerical results show that there is the attraction interaction between the bubbles with the same size,and the attraction and repulsion appear alternately because the phase of interacting forces vary with time when the two bubbles have different sizes.By high speed photography,the distribution of bubbles is observed in the ultrasonic field caused by the working transducer whose radiation surface is submerged in the tap water.When a local bubble cluster moves to the region where sound pressure is weaker,there is a single bubble escaped continuously from the pit of bubble cluster surface,which presents that bubbles repulse each other in that position.The two bubbles are attractive to each other when their sizes are almost same.

关 键 词：气泡动力学 泡群 相互作用力 高速摄影 

分 类 号：O426.2[理学—声学]