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A kinetic equation with kinetic entropy functions for scalar conservation laws
Author(s) -
Benoı̂t Perthame,
Eitan Tadmor
Publication year - 1991
Publication title -
communications in mathematical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.662
H-Index - 152
eISSN - 1432-0916
pISSN - 0010-3616
DOI - 10.1007/bf02099071
Subject(s) - conservation law , kinetic energy , compact space , entropy (arrow of time) , mathematics , h theorem , nonlinear system , boltzmann's entropy formula , statistical physics , boltzmann constant , boltzmann equation , scalar (mathematics) , mathematical analysis , binary entropy function , physics , principle of maximum entropy , maximum entropy thermodynamics , classical mechanics , thermodynamics , quantum mechanics , statistics , geometry
We construct a nonlinear kinetic equation and prove that it is welladapted to describe general multidimensional scalar conservation laws. In particular we prove that it is well-posed uniformly in ε — the microscopic scale. We also show that the proposed kinetic equation is equipped with a family of kinetic entropy functions — analogous to Boltzmann's microscopicH-function, such that they recover Krushkov-type entropy inequality on the macroscopic scale. Finally, we prove by both — BV compactness arguments in the multidimensional case and by compensated compactness arguments in the one-dimensional case, that the local density of kinetic particles admits a “continuum” limit, as it converges strongly with ε↓0 to the unique entropy solution of the corresponding conservation law.

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