Year: 2026
Type: preprint
Abstract: In this paper, we investigate a viscous regularization for the BGK model of the Boltzmann equation and its hydrodynamic limit. First, we establish rigorous convergence toward the viscous Euler equations, by exploiting bounds derived from spatial Fisher information. We then analyze the formal derivation of the Euler equations with an entropy inequality for both single-and multi-species case, comparing our results against symmetric hyperbolic thermodynamically compatible theory.
Source: arXiv (Cornell University)
Authors: Puppo, Gabriella, Rey, Thomas, Tenna, Tommaso
Institution: Laboratoire Jean-Alexandre Dieudonné
Language: English
Subfield: Applied Mathematics
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7215052343