title: Subcritical Kelvin-Helmholtz instability in a Hele-Shaw cell.
abstract: We investigate experimentally the subcritical behavior of the Kelvin-Helmholtz instability for a gas-liquid shearing flow in a Hele-Shaw cell. The subcritical curve separating the solutions of a stable plane interface and a fully saturated nonlinear wave train is determined. Experimental results are fitted by a fifth order complex Ginzburg-Landau equation whose linear coefficients are compared to theoretical ones.
authors.affiliation: Laboratoire Fluides, Automatique et Systèmes Thermiques, Universités Paris-Sud and P. & M. Curie, Bâtiment 502, Campus Universitaire, 91405 Orsay Cedex, France.
authors.forename: L
authors.initials: L
authors.lastname: Meignin
authors.forename: P
authors.initials: P
authors.lastname: Gondret
authors.forename: C
authors.initials: C
authors.lastname: Ruyer-Quil
authors.forename: M
authors.initials: M
authors.lastname: Rabaud