Vertical vibration dynamics of acoustically levitated drop containing two immiscible liquids
Vertical vibration dynamics of acoustically levitated drop containing two immiscible liquids
复制标题
DOI：
10.1063/1.4962462
复制
发表时间：
2016-09
影响因子：
4
通讯作者：
D. Zang;Zhicong Zhai;Lin Li;Kejun Lin;Xiaoguang Li;Xingguo Geng
中科院分区：
文献类型：
--
作者：
D. Zang;Zhicong Zhai;Lin Li;Kejun Lin;Xiaoguang Li;Xingguo Geng
研究了含两种不互溶液体的复杂液滴的悬浮和振荡动力学。根据悬浮过程的不同，得到了两种类型的液滴：核壳液滴和异形液滴。使用高速摄像机研究了液滴的振荡动力学。研究发现，异形液滴的振荡周期比核壳液滴的振荡周期长，衰减速度快，这不能用空气阻力本身来解释。由于伯努利效应，由超声引起的声流可以带来抵抗液滴运动的附加力。这是声悬浮中振荡期间阻尼增强的原因。
We have studied the levitation and oscillation dynamics of complex drops containing two immiscible liquids. Two types of drops, core-shell drop and abnormal-shaped drop, have been obtained depending on the levitation procedures. The oscillation dynamics of the drops have been studied using a high speed camera. It has been found that the oscillation of the abnormal-shaped drop has a longer oscillation period and decays much faster than that of the core-shell drop, which cannot be accounted for by the air resistance itself. The acoustic streaming induced by ultrasound may bring an additional force against the motion of the drop due to the Bernoulli effect. This is responsible for the enhanced damping during the oscillation in acoustic levitation.