Journal of Fluid Mechanics

Papers

Dynamics of transient cavities

V. DUCLAUXa1, F. CAILLÉa1, C. DUEZa2, C. YBERTa2, L. BOCQUETa2 and C. CLANETa1

a1 IRPHE, UMR 6594, 49 rue F. Joliot-Curie, BP 146, 13384 Marseille, France

a2 Laboratoire PMCN, UMR CNRS 5586, Université Lyon I, 69622 Villeurbanne, France

Abstract

We study the collapse of a transient cavity of air in water created by the impact of a solid body. Experimentally, we characterize the dynamics of the cavity from its creation (t = 0) until it collapses (t = τ) in the limit where inertia dominates viscous and capillary effects. Theoretically, we find in this regime an approximate analytical solution which describes the time evolution of the shape of the cavity. This theoretical solution predicts the existence of two different types of cavities that we also observe experimentally.

(Received December 01 2005)

(Revised May 10 2007)

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