Droplet impingement and wetting behavior on a chemically heterogeneous surface in the Beyond-Cassie-Baxter regime
Droplet impingement and wetting behavior on a chemically heterogeneous surface in the Beyond-Cassie-Baxter regime
复制标题
Beyond-Cassie-Baxter 体系中化学异质表面上的液滴撞击和润湿行为
DOI：
10.1002/aic.16263
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发表时间：
2020
期刊：
影响因子：
3.7
通讯作者：
Derksen Jos J.
中科院分区：
文献类型：
--
作者：
Yi Guina;Cai Ziqi;Gao Zhengming;Jiang Zhichao;Huang Xiongbin;Derksen Jos J.
Droplet impingement and anisotropic wetting on chemically heterogeneous stripe‐patterned surfaces is simulated by means of many‐body dissipative particle dynamics. The ratio of the stripe width and initial droplet diameter, defined asβ, ranges from 0.5 to 1.0 so that the wetting process is in the Beyond–Cassie–Baxter regime and is highly anisotropic. At zero Weber number (that is, without considering droplet inertia) and with superhydrophobic stripes,βis the only factor affecting the droplet perpendicular contact angle and aspect ratio. For inertial droplets,βand the Weber number are found to have an effect on the eventual droplet morphology on multi‐striped surfaces. These morphologies include elongated shape, split‐off, and “butterfly” shape. A correlation for critical split‐off conditions has been determined. An energy analysis of droplet impingement shows that the normalized surface energy of the droplet is independent of the Weber number if the droplet is elongated or butterfly‐shaped.
