Several studies have reported the use of high‐intensity ultrasound (HIU) to induce the crystallization of lipids. The effect that HIU has on lipid crystallization is usually attributed to the generation of cavities but acoustic cavitation has never been fully explored in lipids. The dynamics of a particular cavitation cluster next to a piston like emitter (PLE) in an oil was investigated in this study. The lipid systems, which are important in food processing, are studied with high‐speed camera imaging, laser scattering, and acoustic pressure measurements. A sequence of stable clusters was noted. In addition, a bifurcated streamer was detected, which exists within a sequence of clusters. This is shown to originate from two clusters on the PLE tip oscillating with a 180° phase shift in time with respect to one another. Finally, the collapse phase of the cluster is shown to involve a rapid (~10 μs) two‐stage process. These results show that the dynamics of cluster formation and collapse is driven by HIU power levels and might have implications in lipid sonocrystallization.

中文翻译：

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脂质系统中的空化团簇：分叉流光的产生和气泡团簇的双重塌陷

几项研究报告了使用高强度超声（HIU）诱导脂质的结晶。HIU对脂质结晶的影响通常归因于空洞的产生，但声空化尚未在脂质中得到充分研究。在这项研究中，研究了油中靠近活塞（如发射器）（PLE）的特定空化簇的动力学。通过高速相机成像，激光散射和声压测量研究了在食品加工中很重要的脂质系统。记录了一系列稳定的簇。另外，检测到分叉的拖缆，其存在于一系列簇中。已显示这是由于PLE尖端上的两个簇相对于彼此以180°的时间相移振荡而引起的。最后，团簇的坍塌阶段被证明涉及一个快速（〜10μs）的两阶段过程。这些结果表明，簇形成和崩溃的动力学是由HIU功率水平驱动的，可能对脂质的声结晶有影响。