An error estimate uniform in time for spectral semi-galerkin approximations of the nonhomogeneous navier-stokes equations |
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Authors: | J L Boldrini M Rojas-Medar |
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Institution: | Imecc - Unicamp , Caixa Postal 6065, Campinas, SP, 13081-970, Brazil |
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Abstract: | We consider the spectral semi-Galerkin method applied to the non-homogeneous Navier-Stokes equations, which describes the motion of miscibles fluids. Under certain conditions it is known that the aproximate solutions constructed by using this method converge to a global strong solution of these equations. In this paper we prove that these solutions satisfy an optimal uniform in time error estimate in the H 1-norm for the velocity. We also derive an uniform error estimate in the L ∞-norm for the density and an improved error estimate in the L 2-norm for the velocity. |
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