Holzfuss Joachim
Institut für Angewandte Physik, TU Darmstadt, Schlossgartenstrasse 7, 64289 Darmstadt, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2008 Jun;77(6 Pt 2):066309. doi: 10.1103/PhysRevE.77.066309. Epub 2008 Jun 17.
Numerical results are presented for hydrodynamic instabilities surrounding the parameter space of sonoluminescing bubbles. The Rayleigh-Taylor instability is shown to limit bubble oscillations only in a small region near a border at small radii in noisy environments. Also, two different noise-induced instabilities by secondary collapses are identified. The reason for period-doubled, anisotropic emission is found to be the coupling of radial and surface oscillations. Furthermore, an approximate universal border is shown to exist above which the bubble is destroyed by the parametric instability. The results are compared to experimental results from several publications using different experimental setups.
给出了围绕声致发光气泡参数空间的流体动力学不稳定性的数值结果。结果表明，瑞利 - 泰勒不稳定性仅在噪声环境中靠近小半径边界的小区域内限制气泡振荡。此外，还识别出了由二次坍缩引起的两种不同的噪声诱导不稳定性。发现周期加倍、各向异性发射的原因是径向振荡和表面振荡的耦合。此外，还显示存在一个近似通用边界，超过该边界气泡会因参数不稳定性而被破坏。将这些结果与使用不同实验装置的几篇出版物的实验结果进行了比较。
