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Article type: Research Article
Authors: Novotný, Antonín | Růžička, Michael | Thäter, Gudrun;
Affiliations: Université du Sud Toulon-Var, BP 132, F-83957 La Garde Cedex, France | Angewandte Mathematik, Universität Freiburg, Eckerstr. 1, D-79104 Freiburg, Germany | Angewandte Mathematik IV, Universität Karlsruhe, D-76128 Karlsruhe, Germany
Note: [] Corresponding author: Gudrun Thäter, Angewandte Mathematik IV, Universität Karlsruhe, D-76128 Karlsruhe, Germany. Tel.: +49 721 608 4 5840; Fax: +49 721 608 4 4178; E-mail: gudrun.thaeter@kit.edu.
Abstract: It is shown that the anelastic Oberbeck–Boussinesq system is a small Mach, small Péclet and small Froude number limit of the complete Navier–Stokes–Fourier system for gases with large specific heat at constant volume. This result is obtained on an arbitrary large time interval. The proof allows an intrinsic view into the process of separation of fast oscillating acoustic waves, governed by a Lighthill-type equation, from the equations describing the slow fluid flows. This is a very useful information for numerical analysts.
Keywords: anelastic approximation
DOI: 10.3233/ASY-2011-1056
Journal: Asymptotic Analysis, vol. 75, no. 1-2, pp. 93-123, 2011
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