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Maximum spread of droplets on chemically striped surfaces
Author(s) -
Zou Lei,
Wang Hong,
Zhu Xun,
Chen Rong,
Ding Yudong,
Liao Qiang
Publication year - 2020
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16774
Subject(s) - moment (physics) , microfluidics , mechanics , materials science , shape factor , aspect ratio (aeronautics) , nanotechnology , physics , composite material , geometry , classical mechanics , mathematics
Chemically striped surfaces have a strong ability to control the shape of droplets and even to split a droplet, which can be applied in microfluidic, printing fields and spray cooling fields. The droplet splitting behavior is affected by the number of hydrophobic stripes spanned by the droplet at its maximum spread moment, which is determined by the maximum spreading factor. In this study, an area ratio is adopted to analyze a droplet's spread on the hydrophilic and hydrophobic regions at maximum spread moment. Coupled with an energy conservation equation, an analytical model is presented to predict the maximum spread factor of a droplet on a chemically striped surface.