TY - JOUR
T1 - Drops on the Underside of a Slightly Inclined Wet Substrate Move Too Fast to Grow
AU - Jambon-Puillet, Etienne
AU - Ledda, Pier Giuseppe
AU - Gallaire, François
AU - Brun, P. T.
N1 - Publisher Copyright:
© 2021 American Physical Society.
PY - 2021/7/23
Y1 - 2021/7/23
N2 - Pendant drops suspended on the underside of a wet substrate are known to accumulate fluid from the surrounding thin liquid film, a process that often results in dripping. The growth of such drops is hastened by their ability to translate over an otherwise uniform horizontal film. Here we show that this scenario is surprisingly reversed when the substrate is slightly tilted (≈2°); drops become too fast to grow and shrink over the course of their motion. Combining experiments and numerical simulations, we rationalize the transition between the conventional growth regime and the previously unknown decay regime we report. Using an analytical treatment of the Landau-Levich meniscus that connects the drop to the film, we quantitatively predict the drop dynamics in the two flow regimes and the value of the critical inclination angle where the transition between them occurs.
AB - Pendant drops suspended on the underside of a wet substrate are known to accumulate fluid from the surrounding thin liquid film, a process that often results in dripping. The growth of such drops is hastened by their ability to translate over an otherwise uniform horizontal film. Here we show that this scenario is surprisingly reversed when the substrate is slightly tilted (≈2°); drops become too fast to grow and shrink over the course of their motion. Combining experiments and numerical simulations, we rationalize the transition between the conventional growth regime and the previously unknown decay regime we report. Using an analytical treatment of the Landau-Levich meniscus that connects the drop to the film, we quantitatively predict the drop dynamics in the two flow regimes and the value of the critical inclination angle where the transition between them occurs.
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U2 - 10.1103/PhysRevLett.127.044503
DO - 10.1103/PhysRevLett.127.044503
M3 - Article
C2 - 34355965
AN - SCOPUS:85111504917
SN - 0031-9007
VL - 127
JO - Physical review letters
JF - Physical review letters
IS - 4
M1 - 44503
ER -