Bubble effect on Kelvin-Helmholtz' instability
  We derive boundary conditions at interfaces (contact discontinuities) for a class of Lagrangian models describing, in particular, bubbly flows. We use these conditions to study Kelvin-Helmholtz' instability which develops in the flow of two superposed layers of a pure incompressible fluid and a fluid containing gas bubbles, co-flowing with different velocities. We show that the presence of bubbles in one layer stabilizes the flow in some intervals of wave lengths. 
Sergey L. Gavrilyuk, Henri Gouin (MSNMGP, LMMT), Vladimir M. Teshukov