On the lifetime of evaporating sessile droplets

Nguyen, Tuan A. H. and Nguyen, Anh V. (2012) On the lifetime of evaporating sessile droplets. Langmuir, 28 3: 1924-1930. doi:10.1021/la2036955


Author Nguyen, Tuan A. H.
Nguyen, Anh V.
Title On the lifetime of evaporating sessile droplets
Journal name Langmuir   Check publisher's open access policy
ISSN 0743-7463
1520-5827
Publication date 2012-01
Sub-type Article (original research)
DOI 10.1021/la2036955
Volume 28
Issue 3
Start page 1924
End page 1930
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2013
Language eng
Abstract The evaporation of sessile droplets with a constant base radius (pinning mode) and a constant contact angle (depinning mode) has been experimentally observed. Here we analyzed the effect of substrate hydrophobicity on the lifetimes of evaporating droplets for the two modes. Theoretical predictions were obtained and compared with available experimental results. The theoretical analysis and experimental results show that linear methods of extrapolating limited experimental data for a transient droplet contact angle and base radius overpredict the droplet lifetime. Likewise, the linear extrapolation of limited experimental data for transient droplet volume underpredicts the droplet lifetime. Correct methods of extrapolating limited experimental data for transient droplet parameters are described, discussed, and validated. The new methods removed inconsistencies in the previous theory and experimental analysis. Master equations and master curves for the droplet lifetime for the two evaporation modes are obtained and experimentally confirmed.
Keyword Solid-Surfaces
Drops
Substrate
Flow
Air
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2013 Collection
 
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