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arXiv 1701.07613physics.flu-dyn
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有限振幅毛细波的频散和粘性衰减

Dispersion and viscous attenuation of capillary waves with finite amplitude

Fabian Denner, Gounséti Paré, Stéphane Zaleski

摘要:

我们提出了一个全面的研究有限振幅的毛细波的色散,直接数值模拟的基础上。所提出的结果表明,粘性衰减的增加,因此,一个较小的频率的毛细管波与初始波振幅增加。然而,有趣的是,临界波数以及观察到的最大频率的波数对于给定的两相系统保持相同,而与波的振幅无关。通过设计一个经验的相关性,描述了粘性衰减上的波的振幅的效果,有限的初始振幅的毛细波的色散被证明是,在很好的近似,自相似的整个欠阻尼制度和独立的流体性质。研究结果还表明,微幅毛细波的解析解对于中等幅毛细波也是适用的,并具有合理的精度。

英文摘要:

We present a comprehensive study of the dispersion of capillary waves with finite amplitude, based on direct numerical simulations. The presented results show an increase of viscous attenuation and, consequently, a smaller frequency of capillary waves with increasing initial wave amplitude. Interestingly, however, the critical wavenumber as well as the wavenumber at which the maximum frequency is observed remain the same for a given two-phase system, irrespective of the wave amplitude. By devising an empirical correlation that describes the effect of the wave amplitude on the viscous attenuation, the dispersion of capillary waves with finite initial amplitude is shown to be, in very good approximation, self-similar throughout the entire underdamped regime and independent of the fluid properties. The results also shown that analytical solutions for capillary waves with infinitesimal amplitude are applicable with reasonable accuracy for capillary waves with moderate amplitude.

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。

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