期刊
CHINESE PHYSICS B
卷 29, 期 9, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/ab8ac7
关键词
evaporation; droplets; Onsager variational principle; contact line motion
资金
- National Natural Science Foundation of China [21822302]
- joint NSFC-ISF Research Program, China [21961142020]
- Fundamental Research Funds for the Central Universities, China
- National College Students' Innovative and Entrepreneurial Training Plan Program, China [201910006142]
The drying of liquid droplets is a common phenomenon in daily life, and has long attracted special interest in scientific research. We propose a simple model to quantify the shape evolution of drying droplets. The model takes into account the friction constant between the contact line (CL) and the substrate, the capillary forces, and the evaporation rate. Two typical evaporation processes observed in experiments, i.e., the constant contact radius (CCR) and the constant contact angle (CCA), are demonstrated by the model. Moreover, the simple model shows complicated evaporation dynamics, for example, the CL first spreads and then recedes during evaporation. Analytical models of no evaporation, CCR, and CCA cases are given, respectively. The scaling law of the CL or the contact angle as a function of time obtained by analytical model is consistent with the full numerical model, and they are all subjected to experimental tests. The general model facilitates a quantitative understanding of the physical mechanism underlying the drying of liquid droplets.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据