Behnia Sohrab, Sojahrood Amin Jafari, Soltanpoor Wiria, Jahanbakhsh Okhtay
Department of Physics, IAU, Daneshkadeh Street, Urmia, PO Box 523, Iran.
Ultrason Sonochem. 2009 Apr;16(4):502-11. doi: 10.1016/j.ultsonch.2008.12.016. Epub 2009 Jan 6.
Nonlinear dynamics of a spherical cavitation bubble was studied. A method based on applying a periodic perturbation to suppress chaotic oscillations is introduced. The relation between this method and dual frequency ultrasonic irradiation is correlated to prove its applicability in applications involving cavitation phenomena. Results indicated its strong impact on reducing the chaotic oscillations to regular ones. The governing parameters are the secondary frequency value and the phase difference between the secondary frequency and the fundamental one. In the end, the possible application of this method in high intensity focused ultrasound tumor ablation as an instance, is discussed accounting for both free bubbles and microbubbles.
研究了球形空化泡的非线性动力学。介绍了一种基于施加周期性扰动来抑制混沌振荡的方法。将该方法与双频超声辐照的关系进行关联，以证明其在涉及空化现象的应用中的适用性。结果表明其对将混沌振荡减少为规则振荡有强烈影响。控制参数是二次频率值以及二次频率与基频之间的相位差。最后，以高强度聚焦超声肿瘤消融为例，讨论了该方法在考虑自由气泡和微气泡情况下的可能应用。
