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Numerical investigation of the effect of dual frequency sonication on stable bubble dynamics
Ultrasonics Sonochemistry ( IF 8.7 ) Pub Date : 2018-08-24 , DOI: 10.1016/j.ultsonch.2018.08.025
Kaouther Kerboua , Oualid Hamdaoui

A computational study aiming to simulate an oxygen single acoustic bubble oscillation under a dual-frequency sonication was presented in this paper. The non-linear response of the bubble to the superposition of two fields of ultrasonic waves was investigated through dynamics parameters, collapse ratios and average velocities. The main goal of this analyze is to link the properties of the wave resulting from the dual-frequency excitation to the dynamics behavior of the bubble. The obtained results prove that, in contrast with the mono-frequency, coupling a wave to lower frequencies enhances the collapse duration and raises the compression ratio in the case of 35 kHz, while associating any of the studied waves to a higher frequency elevates the number of bubble oscillations during a time interval as compared to mono-frequency. The total sonochemical production has been investigated in accordance with the dynamics results, as well as the proportions of the three predominant free radicals, that show a dependency on the value of the basic frequency.



中文翻译:

双频超声处理对稳定气泡动力学影响的数值研究

本文进行了旨在模拟双频声波作用下氧气单声气泡振荡的计算研究。通过动力学参数,坍塌比和平均速度研究了气泡对超声波两个场的叠加的非线性响应。该分析的主要目的是将双频激发产生的波的特性与气泡的动力学行为联系起来。所获得的结果证明,与单频相反,在35 kHz的情况下,将波耦合到较低的频率会增加崩溃持续时间并提高压缩率,而将任何一个已研究的波与较高的频率关联会增加频率。与单频相比,在一个时间间隔内气泡振荡的变化。

更新日期:2018-08-26
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