Pfeiffer Patricia, Ohl Claus-Dieter
Institute for Physics, Otto von Guericke University Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany.
Sci Rep. 2020 Aug 6;10(1):13188. doi: 10.1038/s41598-020-69919-7.
The spreading of soap bubbles after forming contact with a substrate is experimentally studied. We find for dry glass substrate that the rim of the spreading soap bubble follows the well known scaling law for inertia dominated spreading [Formula: see text] [Eggers, J., Lister, J., and Stone, H., J. Fluid Mech. 401, 293-310 (1999)]. Varying the viscosity of the soap solutions and the coating of the glass does not affect this spreading behavior qualitatively. Yet, on a wetted surface, the rim obtains a constant radial velocity. Here, the rim splits into two and this new rim trails the main rim. Interestingly, the central film enclosed by the two rims develops radially oriented wrinkles.
对肥皂泡与基底形成接触后展开的过程进行了实验研究。我们发现，对于干燥的玻璃基底，展开的肥皂泡边缘遵循惯性主导展开的著名标度律[公式：见正文][埃格斯，J.，利斯特，J.，和斯通，H.，《流体力学杂志》401，293 - 310(1999)]。改变肥皂溶液的粘度和玻璃的涂层并不会在本质上影响这种展开行为。然而，在湿润表面上，边缘获得恒定的径向速度。在这里，边缘会一分为二，这个新边缘跟在主边缘后面。有趣的是，由两个边缘包围的中央薄膜会形成径向排列的褶皱。
