Bubble rearrangement duration in foams near the jamming point.
We investigate the dynamics of bubble rearrangements in coarsening foams, using a time-resolved multiple light scattering technique. We measure the average duration of such events as a function of the foam confinement pressure. Rearrangements slow down as the pressure is decreased toward the jamming point. Our results are explained by a scaling law based on the balance of pressure and Darcy flow, highlighting an analogy between wet foams with mobile interfaces and suspensions of hard grains.
Université Paris 6, UMR 7588 CNRS-UPMC, INSP, 4 place Jussieu, 75252 Paris cedex 05, France.
Marie
M
Le Merrer
Sylvie
S
Cohen-Addad
Reinhard
R
Höhler