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Title: Numerical investigation of the inertial cavitation threshold by dual-frequency excitation in the fluid and tissue
Authors: Wang, Mingjun
Zhou, Yufeng
Keywords: Acoustic Cavitation
Inertial Cavitation Threshold
DRNTU::Engineering::Aeronautical engineering
Issue Date: 2017
Source: Wang, M., & Zhou, Y. (2018). Numerical investigation of the inertial cavitation threshold by dual-frequency excitation in the fluid and tissue. Ultrasonics Sonochemistry, 42, 327-338. doi:10.1016/j.ultsonch.2017.11.045
Series/Report no.: Ultrasonics Sonochemistry
Abstract: Inertial cavitation thresholds, which are defined as bubble growth by 2-fold from the equilibrium radius, by two types of ultrasonic excitation (at the classical single-frequency mode and dual-frequency mode) were calculated. The effect of the dual-frequency excitation on the inertial cavitation threshold in the different surrounding media (fluid and tissue) was studied, and the paramount parameters (driving frequency, amplitude ratio, phase difference, and frequency ratio) were also optimized to maximize the inertial cavitation. The numerical prediction confirms the previous experimental results that the dual-frequency excitation is capable of reducing the inertial cavitation threshold in comparison to the single-frequency one at the same output power. The dual-frequency excitation at the high frequency (i.e., 3.1 + 3.5 MHz vs. 1.1 + 1.3 MHz) is preferred in this study. The simulation results suggest that the same amplitudes of individual components, zero phase difference, and large frequency difference are beneficial for enhancing the bubble cavitation. Overall, this work may provide a theoretical model for further investigation of dual-frequency excitation and guidance of its applications for a better outcome.
ISSN: 1350-4177
DOI: 10.1016/j.ultsonch.2017.11.045
Rights: © 2017 Elsevier B.V. All rights reserved. This paper was published in Ultrasonics Sonochemistry and is made available with permission of Elsevier B.V.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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