Compactness of weak solutions to the three-dimensional compressible magnetohydrodynamic equations

Details Compactness of weak solutions to the three-dimensional compressible magnetohydrodynamic equations Compactness of weak solutions to the three-dimensional compressible magnetohydrodynamic equations

2009-04-23

arxiv.org/abs/0904.3589v1

J. Differential Equations 245 (2008), 2176-2198

Mathematics

Analysis of PDEs

Scientific paper

The compactness of weak solutions to the magnetohydrodynamic equations for the viscous, compressible, heat conducting fluids is considered in both the three-dimensional space $\R^3$ and the three-dimensional periodic domains. The viscosities, the heat conductivity as well as the magnetic coefficient are allowed to depend on the density, and may vanish on the vacuum. This paper provides a new idea to show the compactness of solutions of viscous, compressible, heat conducting magnetohydrodynamic flows, derives a new entropy identity, and shows that the limit of a sequence of weak solutions is still a weak solution to the compressible magnetohydrodynamic equations.

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