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Some estimates for the anisotropic Navier-Stokes equations and for the hydrostatic approximation. (English) Zbl 0765.76017
Summary: This paper is devoted to the study of the Navier-Stokes equations describing the flow of an incompressible fluid in a shallow domain and to the hydrostatic approximation of these equations. We first study the behaviour of solutions of the Navier-Stokes equations when the depth of the domain tends to zero. We then derive the existence of solutions for the hydrostatic approximation.

MSC:
76D05 Navier-Stokes equations for incompressible viscous fluids
86A05 Hydrology, hydrography, oceanography
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