CHEN Yuanyuan, XU Jinliang, LI Jiwei. Numerical simulation of droplet impact on hybrid surfaces with different wettabilities[J]. CIESC Journal, 2016, (12): 5006-5014.
CHEN Yuanyuan, XU Jinliang, LI Jiwei. Numerical simulation of droplet impact on hybrid surfaces with different wettabilities[J]. CIESC Journal, 2016, (12): 5006-5014.DOI: 10.11949/j.issn.0438-1157.20160662.
Surfaces with patterned domains of different wettabilities can be used for controlling the impact process. The dynamic behavior of droplet impact on hybrid surfaces with different wettabilities is simulated using the VOF method by dimensionless. Effects of Weber number and hydrophilic region diameter are studied with constant Reynold number. A drop impact regime map is generated
in which the impact dynamics is characterized as a function of Weber number and relative diameter of hydrophilic region. With the increase of Weber number
the droplet presents three different status: deposition
pinch-off as a short liquid column and break up as a long liquid column. The threshold Weber number where pinch-off occurs will increase with the increase of hydrophilic region diameter. For high Weber number
the maximum spreading factors are the same for different hydrophilic region diameter. While for low Weber number
the maximum spreading factors will increase with it.