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Serfati solutions to the 2D Euler equations on exterior domains
Journal article   Open access   Peer reviewed

Serfati solutions to the 2D Euler equations on exterior domains

David M. Ambrose, James P. Kelliher, Milton C. Lopes Filho and Helena J. Nussenzveig Lopes
Journal of Differential Equations, v 259(9), pp 4509-4560
05 Nov 2015
url
https://doi.org/10.1016/j.jde.2015.06.001View
Published, Version of Record (VoR)Open Access (Publisher-Specific) Open

Abstract

Euler equations Fluid mechanics
We prove existence and uniqueness of a weak solution to the incompressible 2D Euler equations in the exterior of a bounded smooth obstacle when the initial data is a bounded divergence-free velocity field having bounded scalar curl. This work completes and extends the ideas outlined by P. Serfati for the same problem in the whole-plane case. With non-decaying vorticity, the Biot–Savart integral does not converge, and thus velocity cannot be reconstructed from vorticity in a straightforward way. The key to circumventing this difficulty is the use of the Serfati identity, which is based on the Biot–Savart integral, but holds in more general settings.

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Web of Science research areas
Mathematics
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