Spectral Closure for the Linear Boltzmann-BGK Equation
Analysis of PDEs
2023-06-13 v1 Mathematical Physics
math.MP
Abstract
We give an explicit description of the spectral closure for the three-dimensional linear Boltzmann-BGK equation in terms of the macroscopic fields, density, flow velocity and temperature. This results in a new linear fluid dynamics model which is valid for any relaxation time. The non-local exact fluid dynamics equations are compared to the Euler, Navier--Stokes and Burnett equations. Our results are based on a detailed spectral analysis of the linearized Boltzmann-BGK operator together with a suitable choice of spectral projection.
Cite
@article{arxiv.2306.07103,
title = {Spectral Closure for the Linear Boltzmann-BGK Equation},
author = {Florian Kogelbauer and Ilya Karlin},
journal= {arXiv preprint arXiv:2306.07103},
year = {2023}
}