Global-in-Time Weak Solutions for an Inviscid Free Surface Fluid-Structure Problem Without Damping

Abstract

We consider the Cauchy problem for an inviscid irrotational fluid on a domain with a free boundary governed by a fourth order linear elasticity equation. We first derive the Craig-Sulem-Zakharov formulation of the problem and then establish the existence of a global weak solution in two space dimensions for the fluid, in the general case without a damping term, for any initial data with finite energy.