期刊
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
卷 24, 期 -, 页码 49-53出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colcom.2018.02.004
关键词
Evaporating sessile droplet; Non-wetted surface; Evaporation mass flux; Evaporation mass rate
资金
- CSR grant from Portescap Inc., India
- Industrial Research and Consultancy Centre (IRCC), IIT Bombay [12IRCCSG012]
We investigate evaporation of a sessile droplet on a non-wetted surface in the framework of diffusion-limited and quasi-steady evaporation. We extend previous models and numerically solve Laplace equation for the diffusion of liquid vapor into ambient. We propose a unified, simple and accurate expression of the evaporation mass flux valid for 90 degrees <= theta <= 180 degrees, where theta is the equilibrium contact angle. In addition, using the derived expression of the evaporation mass flux, we propose a simple and accurate expression of the evaporation mass rate for a non-wetted surface, which does not exhibit singularity at theta = 180 degrees. Finally, using the scaling analysis, the expression of the evaporation mass flux is utilized to estimate the direction and magnitude of the characteristic evaporation-driven flow velocity inside the droplet on a non-wetted surface. The predicted flow direction is found to be consistent with the previous measurements.
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