Hydrodynamic limit of the boltzmann equation with contact discontinuities

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Original languageEnglish
Pages (from-to)293-326
Journal / PublicationCommunications in Mathematical Physics
Issue number2
Publication statusPublished - Feb 2010


The hydrodynamic limit for the Boltzmann equation is studied in the case when the limit system, that is, the system of Euler equations contains contact discontinuities. When suitable initial data is chosen to avoid the initial layer, we prove that there exist a family of solutions to the Boltzmann equation globally in time for small Knudsen number. And this family of solutions converge to the local Maxwellian defined by the contact discontinuity of the Euler equations uniformly away from the discontinuity as the Knudsen number ε tends to zero. The proof is obtained by an appropriately chosen scaling and the energy method through the micro-macro decomposition. © Springer-Verlag 2010.

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