2010/12/07 by Francesco Borghero, Francesco Demontis, Borghero, F. +3
Mathematics · Engineering · Physics and Astronomy · #Gas Dynamics and Kinetic Theory #Computational Fluid Dynamics and Aerodynamics #Ionosphere and magnetosphere dynamics
paper · pdf · doi:10.48550/arxiv.1012.1482
An exact macroscopic extended model for ultrarelativistic gases, with an arbitrary number of moments, is present in the literature. Here we exploit equations determining wave speeds for that model. We find interesting results; for example, the whole system for their determination can be divided into independent subsystems and some, but not all, wave speeds are expressed by rational numbers. Moreover, the extraordinary property that these wave speeds for the macroscopic model are the same of those in the kinetic model, is proved.