title: Reverse undercompressive shock structures in driven thin film flow.
abstract: We show experimental and computational evidence of a new structure: an undercompressive and reverse undercompressive shock for draining films driven by a surface tension gradient against gravity. The reverse undercompressive shock is unstable to transverse perturbations while the leading undercompressive shock is stable. Depending on the pinch-off film thickness, as controlled by the meniscus, either a trailing rarefaction wave or a compressive shock separates from the reverse undercompressive shock.
authors.affiliation: Department of Physics and Center for Nonlinear and Complex Systems, Duke University, Durham, North Carolina 27708, USA.
authors.forename: Jeanman
authors.initials: J
authors.lastname: Sur
authors.forename: Andrea L
authors.initials: AL
authors.lastname: Bertozzi
authors.forename: Robert P
authors.initials: RP
authors.lastname: Behringer