物理学报2012，Vol.61Issue(13)：224-229,6.
声悬浮条件下黏性液滴的扇谐振荡规律研究
Sectorial oscillation of acoustically levitated viscous drops
摘要
Abstract
The sectorial oscillation of acoustically levitated viscous drops is investigated by applying a series of aqueous glycerol solutions （viscosity μ = 0.94-75.65 mPa.s）. It is found that there exists a critical viscosity μc for a definite mode of sectorial oscillation, and that mode can be excited only when μ 〈 μc. The critical viscosities for the l = 2--9th mode sectorial oscillation are experimentally determined with a modulation amplitude to the acoustic field reaching r/= 0.23. It is found that in μc decreases approximately linearly with I. Analysis based on the parametric resonance theory indicates that in order to excite the sectorial oscillation, the equatorial radius of the drop must be perturbed over a threshold he, which is proportional to the viscosity/~ and increases with I. Therefore, the sectorial oscillations can hardly be excited to those drops with high viscosity and large oscillation modes. Both the amplitude and resonant modulating frequency width decrease with the enlargement of viscosity. No obvious effect of viscosity is found on the eigenfrequency of sectorial oscillation.关键词
声悬浮/扇谐振荡/黏度/参数共振Key words
acoustic levitation/sectorial oscillation/viscosity/parametric resonance分类
信息技术与安全科学引用本文复制引用
邵学鹏,解文军..声悬浮条件下黏性液滴的扇谐振荡规律研究[J].物理学报,2012,61(13):224-229,6.基金项目
国家自然科学基金（批准号：51071126）资助的课题 （）
