Local discrete velocity grids for deterministic rarefied flow simulations
Langue
en
Article de revue
Ce document a été publié dans
Journal of Computational Physics. 2014, vol. 266, n° 1, p. 22-46
Elsevier
Résumé en anglais
Most of numerical methods for deterministic simulations of rarefied gas flows use the discrete velocity (or discrete ordinate) approximation. In this approach, the kinetic equation is approximated with a global velocity ...Lire la suite >
Most of numerical methods for deterministic simulations of rarefied gas flows use the discrete velocity (or discrete ordinate) approximation. In this approach, the kinetic equation is approximated with a global velocity grid. The grid must be large and fine enough to capture all the distribution functions, which is very expensive for high speed flows (like in hypersonic aerodynamics). In this article, we propose to use instead different velocity grids that are local in time and space: these grids dynamically adapt to the width of the distribution functions. The advantages and drawbacks of the method are illustrated in several 1D test cases.< Réduire
Mots clés en anglais
kinetic equations
discrete velocity model
deterministic method
rarefied gas dynamics
Origine
Importé de halUnités de recherche