Construction of BGK models with a family of kinetic entropies for a given system of conservation laws

F Bouchut - Journal of statistical physics, 1999 - Springer
We introduce a general framework for kinetic BGK models. We assume to be given a system
of hyperbolic conservation laws with a family of Lax entropies, and we characterize the BGK …

Discrete kinetic schemes for multidimensional systems of conservation laws

D Aregba-Driollet, R Natalini - SIAM Journal on Numerical Analysis, 2000 - SIAM
We present here some numerical schemes for general multidimensional systems of
conservation laws based on a class of discrete kinetic approximations, which includes the …

Global existence of smooth solutions for partially dissipative hyperbolic systems with a convex entropy

B Hanouzet, R Natalini - Archive for Rational Mechanics and Analysis, 2003 - Springer
We consider the Cauchy problem for a general one-dimensional n× n hyperbolic
symmetrizable system of balance laws. It is well known that, in many physical examples, for …

[PDF][PDF] Recent mathematical results on hyperbolic relaxation problems

R Natalini - Quaderno IAC, 1998 - researchgate.net
The aim of these lecture notes is to try to give a survey of some recent mathematical
developments in the eld of hyperbolic relaxation problems. This kind of problems often arise …

Basic aspects of hyperbolic relaxation systems

TP Liu, G Métivier, J Smoller, B Temple… - Advances in the theory …, 2001 - Springer
This article presents a systematic consideration of hyperbolic systems of first-order partial
differential equations with source terms divided by a small parameter e. Starting with von …

Numerical approximations of a traffic flow model on networks

G Bretti, R Natalini, B Piccoli - Networks and Heterogeneous Media, 2006 - aimsciences.org
We consider a mathematical model for fluid-dynamic flows on networks which is based on
conservation laws. Road networks are considered as graphs composed by arcs that meet at …

Numerical passage from systems of conservation laws to Hamilton--Jacobi equations, and relaxation schemes

S **, Z **n - SIAM Journal on Numerical Analysis, 1998 - SIAM
In this paper we study the numerical transition from a Hamilton--Jacobi (H--J) equation to its
associated system of conservation laws in arbitrary space dimensions. We first study how, in …

Entropy satisfying flux vector splittings and kinetic BGK models

F Bouchut - Numerische Mathematik, 2003 - Springer
We establish forward and backward relations between entropy satisfying BGK relaxation
models such as those introduced previously by the author and the first order flux vector …

Explicit diffusive kinetic schemes for nonlinear degenerate parabolic systems

D Aregba-Driollet, R Natalini, S Tang - Mathematics of computation, 2004 - ams.org
We design numerical schemes for nonlinear degenerate parabolic systems with possibly
dominant convection. These schemes are based on discrete BGK models where both …

Diffusive BGK approximations for nonlinear multidimensional parabolic equations

F Bouchut, FR Guarguaglini, R Natalini - Indiana University Mathematics …, 2000 - JSTOR
We introduce a class of discrete velocity BGK type approximations to multidimensional
scalar nonlinearly diffusive conservation laws. We prove the well-posedness of these …