Stability mechanisms of oscillating vapor bubbles in acoustic fields
Stability mechanisms of oscillating vapor bubbles in acoustic fields
复制标题
声场中振荡气泡的稳定性机制
DOI：
10.1016/j.ultsonch.2017.08.030
复制
发表时间：
2018
影响因子：
8.4
通讯作者：
Xiaoze Du
中科院分区：
文献类型：
--
作者：
Yuning Zhang;Yuhang Gao;Xiaoze Du
汽泡不稳定性可增强声化学活性，加快反应速率。本文在较宽的参数范围内（包括气泡半径、声波频率和压力幅值），通过结合气泡的球稳定性和刚度稳定性，研究了声场中汽泡的不稳定性，以确定汽泡的稳定状态。根据气泡振荡的稳定性特征，将气泡振荡状态分为四个区域。详细讨论了几个重要参数对气泡稳定性的影响。定量地给出了不同阶数的球面不稳定性以及高频和低频极限的情况。本工作的实际应用有两个方面：快速声化学反应参数区的识别;球形气泡假设对于简化数值研究的有效性。
Vapor bubble instability could enhance the sonochemical activities and accelerate the reaction rate. In the present paper, vapor bubble instability in acoustic fields is investigated through combining both the spherical and stiffness stabilities within a wide range of parameter zone (consisting of bubble radius, acoustic frequency and pressure amplitude) in order to determine the stability states of vapor bubbles. The status of bubble oscillations are divided into four zones in terms of their stability characteristics. Influences of several paramount parameters on the bubble stability are demonstrated in detail. Different orders of spherical instability are quantitatively given together with cases in high-frequency and low-frequency limits. The practical applications of the present work are twofold: identification of the parameter zones with rapid sonochemical reactions; validity of the spherical bubble assumption for simplification of the numerical studies.