Over the past decade 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 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 pressure measurements. A sequence of stable clusters were 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 an 1800 phase relationship with respect to one another. Finally, the collapse phase of the cluster is shown to involve a rapid (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.
.txt; .cvs; .tif; .pdf
USDA, National Institute of Food and Agriculture (NIFA)
Utah State University
USDA, National Institute of Food and Agriculture (NIFA) 2017-67017-26476
Understanding bubble dynamics in sonicated edible lipids to improve their physiochemical properties
Data collected using an oscilloscope or a high-speed camera. Processed using VB2010 software utilizing NI Measurement studio or, where appropriate, manufacturer supplied software (Photron for example).
Birkin, P. R., Martin, H. L., Youngs, J. J., Truscott, T. T., Merritt, A. S., Elison, E. J., & Martini, S. (2019). Cavitation Clusters in Lipid Systems: The Generation of a Bifurcated Streamer and the Dual Collapse of a Bubble Cluster. Journal of the American Oil Chemists’ Society, aocs.12283. https://doi.org/10.1002/aocs.12283
Code lists for the .csv files associated with Figure 1 are found in the file named figure_1_data_format.txt.
Code lists for the .csv files associated with Figure 5 are found in the file named figure_5_data_format.txt.
Chemistry | Food Science
This work is licensed under a Creative Commons Attribution 4.0 License.
Martini, S., Birkin, P., & Truscott, T. T. (2019). Cavitation Clusters in Lipid Systems – The Generation of a Bifurcated Streamer and the Dual Collapse of a Bubble Cluster. Utah State University, doi:10.26078/3ndt-3q42
Additional FilesREADME.txt (3 kB)
Figure_1.zip (20308 kB)
Figure_2.zip (1 kB)
Figure_3.zip (1554 kB)
Figure_4.zip (563 kB)
Figure_5.zip (4 kB)