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Annals of PDE

, 4:20 | Cite as

On the Motion of a Compressible Gravity Water Wave with Vorticity

  • Chenyun LuoEmail author
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Abstract

We prove a priori estimates for the compressible Euler equations modeling the motion of a liquid with moving physical vacuum boundary with unbounded initial domain. The liquid is under influence of gravity but without surface tension. Our fluid is not assumed to be irrotational. But the physical sign condition needs to be assumed on the free boundary. We generalize the method used in Lindblad and Luo (Commun Pure Appl Math, 2008) to prove the energy estimates in an unbounded domain up to arbitrary order. In addition to that, the a priori energy estimates are in fact uniform in the sound speed \(\kappa \). As a consequence, we obtain the convergence of solutions of compressible Euler equations with a free boundary to solutions of the incompressible equations, generalizing the result of Lindblad and Luo (2008) to when you have an unbounded domain. On the other hand, we prove that there are initial data satisfying the compatibility condition in some weighted Sobolev spaces, and this will propagate within a short time interval, which is essential for proving long time existence for slightly compressible irrotational water waves.

Keywords

PDE Compressible water waves 

Notes

Acknowledgements

I would like to express my deepest thanks to my advisor Hans Lindblad for many useful suggestions and comments. I would like to thank Marcelo Disconzi, Theo Drivas, Dan Ginsberg, Chris Kauffman, Yannick Sire, Qingtang Su, Shengwen Wang, Yi Wang, Yakun Xi and Hang Xu for many long and insightful discussions. In addition, I thank the anonymous referee for careful reading and helpful comments.

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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Vanderbilt UniversityNashvilleUSA

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