title: Destabilization of a viscous film flowing down in the form of a vertical cylindrical curtain.
abstract: In this Letter, we study experimentally a viscous liquid curtain in an annular geometry. Gap and median radius can be varied in such a way that the base of the initially stationary cylindrical curtain is led to oscillate by decreasing the flow rate. Standing and traveling waves in the plane of the annulus are observed and a nontrivial expression linking pulsation to flow rate per surface unit and viscosity can be defined.
authors.affiliation: Institut Non Linéaire de Nice, UMR CNRS 6618, Université de Nice-Sophia Antipolis, 1361 Route des Lucioles, F-06560 Valbonne, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Pirat
authors.forename: Christian
authors.initials: C
authors.lastname: Mathis
authors.forename: Manoranjan
authors.initials: M
authors.lastname: Mishra
authors.forename: Philippe
authors.initials: P
authors.lastname: Maïssa