摘要
用空化泡运动的研究方法推导出超声作用下软物质液滴在与之不相混溶液体中半径变化的运动方程,通过数值模拟探讨了超声频率、声压幅值、初始半径和界面张力系数对液滴半径变化的影响。结果发现:频率越低、声压幅值越大,液滴运动越剧烈;声压幅值小于静压时液滴只在初始半径附近做微小的稳定振动;液滴初始半径越小,液滴运动越剧烈,但初始半径大小不影响液滴最终所能达到的大小;界面张力系数的大小对超声场中液滴半径变化影响不大。
Using the method that have successfully applied in the motion for spherical bubble,the equations of motion for spherical droplets under the sonic assistance conditions are obtained.The effects of ultrasonic frequency,ultrasonic pressure magnitude,initial radius and interfacial ten-sion on the variation of droplets radius are numerical simulated.The result shows that the vibration of droplets is enhanced and the ultrasonic pressure is increased as the decreasing of fre-queucy.The droplets vibrate at their initial radius when the ultrasonic pressure magnitude is smaller than hydrostatic.The droplets will vibrate more obviously with the smaller initial radius, but the initial radius can hardly influence the last radius with the same conditions.Interfacial ten-sion coefficient has little effect on the change of droplets radius in ultrasonic field.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第2期42-47,共6页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(11274216
11474192)
关键词
界面张力
液滴半径
声压幅值
超声频率
interracial tension
radius of spherical droplets
pressure amplitude
ultrasonic frequency
