论文标题
在冷表面部分冻结的二元液滴撞击期间的图案形成
Pattern formation during the impact of a partially-frozen binary droplet on a cold surface
论文作者
论文摘要
液滴对底冷表面的影响是一种复杂的现象，因为它同时煽动了几种涵盖各种运输现象和相变的物理过程。在这里，我们报告并解释了固相生长的意外但高度相关的现象。它在二元液滴的影响期间出现，该液滴在对底层底层造成的影响之前从外部冻结。我们确定在前进的接触线上存在预溶的材料从根本上改变了产生的动力学，即通过修改局部流动迁移率，从而导致与粘性指法类似的不稳定性。此外，我们将固相液滴的界面变形与固相的图案生长之间的相互作用描述为脱节的模式以更快的影响出现。
Impact of a droplet on an undercooled surface is a complex phenomenon as it simultaneously instigates several physical processes that cover a broad spectrum of transport phenomena and phase-transition. Here, we report and explain an unexpected but highly relevant phenomenon of fingered growth of the solid-phase. It emerges during the impact of a binary droplet that freezes from the outside prior to the impact on the undercooled surface. We establish that the presence of pre-solidified material at the advancing contact line fundamentally changes the resulting dynamics, namely by modifying the local flow mobility that leads to an instability analogous to viscous fingering. Moreover, we delineate the interplay between the interfacial deformations of the impacting droplet and patterned growth of the solid-phase as disconnected patterns emerge at faster impacts.
