水中空化单泡的磁场效应  

The magnetic effect of bubble dynamics in water

作　　者：张舍[1] 莫润阳[1] 王成会[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西省超声重点实验室,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2016年第6期39-42,共4页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(11274216);中央高校基本科研业务费专项资金(GK201603102)

摘　　要：基于Navier-Stokes(N-S)方程,推导了稳恒磁场存在时水中空化单气泡的动力学方程,同时数值分析了磁场对气泡运动的影响,并从能量角度讨论了能对水中气泡产生有效抑制作用的磁感应强度范围。结果表明:磁场对气泡振动产生抑制;随着磁场增大,气泡的振动幅度及振动周期减小;磁场能对水中气泡行为产生有效抑制效应的下限应大于0.5T。Based on the Navier-Stokes（N-S）equations,a modified dynamic equation of gas bubble immersed in water is established.Such bubble is driven by a sine sound field and exposed to an uniform external magnetic field.The effect of magnetic field on behavior of bubbles was analyzed numerically.The range of magnetic field which can restrain the bubble vibration is also estimated theoretically from the point of view of energy.The results show that the vibration amplitude and vibration period of the bubble decrease with the magnetic field and the magnetic field can lead fast damping of bubble vibration when it is greater than 0.5T.

关 键 词：气泡动力学 匀强磁场 空气单泡 

分 类 号：O426.9[理学—声学]