Sylvie Benzoni-Gavage, Raphael Danchin, Stephane Descombes
Abstract:
We investigate the initial-value problem
for one-dimensional compressible fluids endowed with internal
capillarity. We focus on the isothermal inviscid case with
variable capillarity. The resulting equations
for the density and the velocity, consisting of
the mass conservation law and the momentum conservation
with Korteweg stress,
are a system of third order nonlinear dispersive
partial differential equations. Additionally, this
system is Hamiltonian and admits travelling solutions,
representing propagating phase boundaries with internal structure.
By change of unknown, it roughly
reduces to a quasilinear Schrodinger equation.
This new formulation enables us to prove
local well-posedness for smooth perturbations
of travelling profiles
and almost-global existence for small enough perturbations.
A blow-up criterion is also derived.
Submitted June 14, 2004. Published May 2, 2006.
Math Subject Classifications: 76N10, 76T10.
Key Words: Capillarity; Korteweg stress; local well-posedness;
Schrodinger equation.
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Sylvie Benzoni-Gavage Institut Camille Jordan, Université Claude Bernard Lyon I 21, avenue Claude Bernard, F-69622 Villeurbanne cedex, France email: benzoni@math.univ-lyon1.fr |
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Raphaël Danchin Centre de Mathématiques, Université Paris XII Val de Marne 61, avenue du Géenéral de Gaulle, F-94010 Créteil cedex, France email: danchin@univ-paris12.fr |
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Stephane Descombes UMPA, ENS Lyon 46, allée d'Italie, F-69364 Lyon cedex 07, France email: sdescomb@umpa.ens-lyon.fr |
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