Subcritical Kelvin-Helmholtz instability in a Hele-Shaw cell.
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.
Meignin
L
L
Laboratoire Fluides, Automatique et Systèmes Thermiques, Universités Paris-Sud and P. & M. Curie, Bâtiment 502, Campus Universitaire, 91405 Orsay Cedex, France.
Gondret
P
P
Ruyer-Quil
C
C
Rabaud
M
M