The destabilization of an initially thick liquid sheet edge
The destabilization of an initially thick liquid sheet edge
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最初厚的液体片边缘的不稳定
DOI：
10.1063/1.3644840
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发表时间：
2011
影响因子：
4.6
通讯作者：
E. Villermaux
中科院分区：
文献类型：
--
作者：
H. Lhuissier;E. Villermaux
通过强迫一个自由肥皂膜的突然去湿的一个边缘上连接到一个直的固体线，我们研究了其自由边缘的衰退和随后的不稳定。与片材邻接的新形成的边缘最初比其所附接的膜厚，这是因为线上预先存在平台边界。因此，初始条件是一个不动的大质量环形边缘连接到一个厚度为h的薄液膜。终端泰勒-库里克后退速度V=2σ/ρh，其中σ和ρ分别是液体表面张力和密度，只有在促进边缘不稳定的瞬时加速期后才能达到。所选择的波长和相关的生长时间与由表面张力驱动的惯性不稳定性相一致。
By forcing the sudden dewetting of a free soap film attached on one edge to a straight solid wire, we study the recession and subsequent destabilization of its free edge. The newly formed rim bordering the sheet is initially thicker than the film to which it is attached, because of the Plateau border preexisting on the wire. The initial condition is thus that of an immobile massive toroidal rim connected to a thin liquid film of thickness h. The terminal Taylor-Culick receding velocity V=2σ/ρh, where σ and ρ are the liquid surface tension and density, respectively, is only reached after a transient acceleration period which promotes the rim destabilization. The selected wavelength and associated growth time coincide with those of an inertial instability driven by surface tension.