title: Shooting in a foam.
abstract: We study the motion of a solid sphere after its fast impact on a bath of liquid foam. We identify two regimes of deceleration. At short times, the velocity is still large and the foam behaves similar to a Newtonian fluid of constant viscosity. Then we measure a velocity threshold below which the sphere starts experiencing the foam's elasticity. We interpret this behavior using a visco-elasto-plastic model for foam rheology. Finally we discuss the possibility of stopping a projectile in the foam, and evaluate the capture efficiency.
authors: PMMH, UMRS 7636 du CNRS, ESPCI, 75005 Paris, France.
authors: Anne
authors: A
authors: Le Goff
authors: David
authors: D
authors: Quéré
authors: Christophe
authors: C
authors: Clanet