arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.11579physics.flu-dynphysics.bio-ph
收藏

空化阈值核尺寸分布的声学测量

Acoustic measurements of the nucleus size distribution at the cavitation threshold

Lauren Mancia, Mauro Rodriguez, Jonathan Sukovich, Scott Haskell, Zhen Xu, Eric Johnsen

摘要:

了解声空化阈值对于最小化诊断超声中的空化生物效应和控制聚焦超声程序中的空化介导的组织消融是至关重要的。均匀空化阈值是一种固有的材料特性,对于需要空化控制的各种应用具有公认的重要性。然而,在水中的空化阈值的声学测量不同于经典的成核理论所预测的。这种持续的差异解释相结合的新方法,声学成核单气泡在阈值与数值模拟,以获得一个核的大小分布与离子稳定nucleii的第一原理估计一致。我们确定声空化阈值作为一个可重复的亚型的异质性空化的特征核尺寸分布。核尺寸分布的知识可以激发新的方法来实现在水,组织和各种其他介质中的空化控制。

英文摘要:

Understanding the acoustic cavitation threshold is essential for minimizing cavitation bioeffects in diagnostic ultrasound and for controlling cavitation--mediated tissue ablation in focused ultrasound procedures. The homogeneous cavitation threshold is an intrinsic material property of recognized importance to a variety of applications requiring cavitation control. However, acoustic measurements of the cavitation threshold in water differ from those predicted by classical nucleation theories. This persistent discrepancy is explained by combining novel methods for acoustically nucleating single bubbles at threshold with numerical modeling to obtain a nucleus size distribution consistent with first--principles estimates for ion--stabilized nucleii. We identify acoustic cavitation at threshold as a reproducible subtype of heterogeneous cavitation with a characteristic nucleus size distribution. Knowledge of the nucleus size distribution could inspire new approaches for achieving cavitation control in water, tissue, and a variety of other media.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑