薄膜对表面波产生涡量的影响
Effect of thin film on the generation of vorticity by surface waves
摘要：
最近发展了一种解释液体中表面波涡量产生的理论方案[S。Filatov等人，物理修订信函116，054501（2016）]。在这里，我们研究如何薄（单分子）薄膜呈现在液体的表面影响所产生的涡。我们表明，涡变参数大于一个干净的表面的情况下，现在它取决于液体的粘度。我们还讨论了粒子被动平流所产生的表面流的运动。其结果可用于不同的应用：从污染物在海洋表面的扩散分析到基于粒子图像速度场测量（PIV）的涡量重建。
英文摘要：
Recently a theoretical scheme explaining the vorticity generation by surface waves in liquids was developed [S. Filatov et al., Phys. Rev. Lett. 116, 054501 (2016)]. Here we study how a thin (monomolecular) film presented at the surface of liquid affects the generated vorticity. We demonstrate that the vorticity becomes parametrically larger than for the case with a clean surface and now it depends on viscosity of the liquid. We also discuss the motion of particles passively advected by the generated surface flow. The results can be used in different applications: from the analysis of pollutants' diffusion on the ocean surface till the reconstruction of vorticity based on the particle image velocimetry (PIV) measurements.
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