title: Morphological transitions of droplets wetting rectangular domains.
abstract: We report the results of comprehensive experiments and numerical calculations of interfacial morphologies of water confined to the hydrophilic top face of rectangular posts of width W = 500 μm and lengths between L = 5W and 30W. A continuous evolution of the interfacial shape from a homogeneous liquid filament to a bulged filament and back is observed during changes in the liquid volume. Above a certain threshold length of L* = 16.0W, the transition between the two morphologies is discontinuous and a bistability of interfacial shapes is observed in a certain interval of the reduced liquid volume V/W(3).
authors.affiliation: CNISM and Dipartimento di Fisica G. Galilei, Università di Padova, Padova, Italy.
authors.forename: Davide
authors.initials: D
authors.lastname: Ferraro
authors.forename: Ciro
authors.initials: C
authors.lastname: Semprebon
authors.forename: Tamara
authors.initials: T
authors.lastname: Tóth
authors.forename: Emanuele
authors.initials: E
authors.lastname: Locatelli
authors.forename: Matteo
authors.initials: M
authors.lastname: Pierno
authors.forename: Giampaolo
authors.initials: G
authors.lastname: Mistura
authors.forename: Martin
authors.initials: M
authors.lastname: Brinkmann