Type: Article
Publication Date: 2005-07-01
Citations: 321
DOI: https://doi.org/10.4007/annals.2005.162.109
We study the motion of an incompressible perfect liquid body in vacuum.This can be thought of as a model for the motion of the ocean or a star.The free surface moves with the velocity of the liquid and the pressure vanishes on the free surface.This leads to a free boundary problem for Euler's equations, where the regularity of the boundary enters to highest order.We prove local existence in Sobolev spaces assuming a "physical condition", related to the fact that the pressure of a fluid has to be positive.