Low Mach number limit of the full Navier-Stokes equations

Details Low Mach number limit of the full Navier-Stokes equations Low Mach number limit of the full Navier-Stokes equations

2005-01-22

arxiv.org/abs/math/0501386v1

Mathematics

Analysis of PDEs

69 pages

Scientific paper

10.1007/s00205-005-0393-2

The low Mach number limit for classical solutions to the full Navier Stokes equations is here studied. The combined effects of large temperature variations and thermal conduction are accounted. In particular we consider general initial data. The equations leads to a singular problem, depending on a small scaling parameter, whose linearized is not uniformly well-posed. Yet, it is proved that the solutions exist and are uniformly bounded for a time interval which is independent of the Mach number Ma in (0,1], the Reynolds number Re in [1,+\infty] and the Peclet number Pe in [1,+\infty]. Based on uniform estimates in Sobolev spaces, and using a Theorem of G. Metivier and S. Schochet, we next prove that the large terms converge locally strongly to zero. It allows us to rigorously justify the well-known formal computations described in the introduction of the book of P.-L. Lions.

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