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- W4313484619 abstract "We prove that traveling waves in viscous compressible liquids are a generic phenomenon. The setting for our result is a horizontally infinite, finite depth layer of compressible, barotropic, viscous fluid, modeled by the free boundary compressible Navier-Stokes equations in dimension $n ge 2$. The bottom boundary of the fluid is flat and rigid, while the top is a moving free boundary. A constant gravitational field acts normal to the flat bottom. We allow external forces to act in the fluid's bulk and external stresses to act on its free surface. These are posited to be in traveling wave form, i.e. time-independent when viewed in a coordinate system moving at a constant, nontrivial velocity parallel to the lower rigid boundary. In the absence of such external sources of stress and force, the fluid system reverts to equilibrium, which corresponds to a flat, quiescent fluid layer with vertically stratified density. In contrast, when such sources of stress or force are present, the system admits traveling wave solutions. We establish a small data well-posedness theory for this problem by proving that for every nontrivial traveling wave speed there exists a nonempty open set of stress and forcing data that give rise to unique traveling wave solutions, and that these solutions depend continuously on the data and the wave speed. When $n ge 3$ we prove this with surface tension accounted for at the free boundary, while in the case $n=2$ we prove this with or without surface tension. To the best of our knowledge, this result constitutes the first general construction of traveling wave solutions to any free boundary compressible fluid equations." @default.
- W4313484619 created "2023-01-06" @default.
- W4313484619 creator A5039406761 @default.
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- W4313484619 date "2023-01-02" @default.
- W4313484619 modified "2023-09-26" @default.
- W4313484619 title "Well-posedness of the traveling wave problem for the free boundary compressible Navier-Stokes equations" @default.
- W4313484619 doi "https://doi.org/10.48550/arxiv.2301.00773" @default.
- W4313484619 hasPublicationYear "2023" @default.
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