期刊
PHYSICS OF FLUIDS
卷 34, 期 1, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0077386
关键词
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资金
- National Natural Science Foundation of China [51776037, 51906039]
- Natural Science Foundation of Jiangsu Province [BK20210239]
This study numerically investigates the dewetting process of droplets in grooves and reveals the important effects of groove geometry and wettability on the process. Three dewetting regimes, namely retention, partial dewetting, and complete dewetting, are identified. Both partial dewetting and complete dewetting are effective ways to remove droplets.
This paper describes a numerical investigation of the groove-embedded droplet dewetting process, namely the spontaneous transition from the Wenzel state to the Cassie state, using the multiphase lattice Boltzmann method. Numerical simulations are employed to reproduce the dynamic behaviors of extension, squeezing, rupture, and ejection of condensation droplets in a groove, allowing us to examine how the groove geometry and wettability affect the dewetting process. Our results identify three dewetting regimes, namely retention, partial dewetting, and complete dewetting. As the groove aspect ratio and hydrophilicity decrease, the dewetting regime changes from retention to partial dewetting, and then to complete dewetting. The partial dewetting and complete dewetting are two effective ways for droplet removing. In particular, a groove sidewall with enhanced hydrophobicity is desirable to stimulate the dewetting process.
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