On the domain of hyperbolicity of the cumulant equations (Q811921)

The first part of this paper gives an overview on modeling flow of a non-reacting mixture of gases by kinetic theory and how to derive approximate, mesoscopic model equations, the moment equations. The second part gives a short overview of the cumulant method, an alternative method of approximation that results in particularly simple equations. For these equations the authors consider constraints imposed on the admissible values of classical variables by demanding hyperbolicity of the resulting equation.