Surface waves in a foam

LE GOFF, ANNE; COBELLI, PABLO JAVIER; LAGUBEAU, GUILLAUME

San Diego, California

Conferencia; 65th Annual Meeting of the APS Division of Fluid Dynamics; 2012

American Physical Society

We investigate the propagation and attenuation of waves generated at the surface of a liquid foam after the impact of a solid sphere. Surface deformation is recorded with high spatial and temporal resolution thanks to a fringe projection technique. We show that most surface waves travel at a velocity of a few meters per second. High velocity impacts also trigger the emission of faster waves. We discuss the nature of these two types of waves.