Regularization of Grad’s 13 moment equations: Derivation and linear analysis

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Globally Hyperbolic Regularization of Grad's Moment System (2011, methodology): “Almost all the regularization methods in references are focused on the reconstruction of fM+1, trying to express fM+1 as a function of the M+1 known variables in some possible ways such as Chapman-Enskog expansion or realizing a positive distribution [12, 19, 8, 23].”
Regularized 13-moment equations: shock structure calculations and comparison to Burnett models (2004, methodology): “In order to point out the main differences, we compare the regularized Burnett equations with the R13 equations in linearized and dimensionless form (see Struchtrup & Torrilhon (2003) for definitions of the dimensionless quantities).”
Invariant Manifolds for Physical and Chemical Kinetics (2005, methodology): “Very recently, this approach was successfully applied to improve the nonlinear Grad’s thirteen-moment equations [253].”
Constructive methods of invariant manifolds for kinetic problems (2003, methodology): “Very recently, this approach was successfully applied to improve the nonlinear Grad's 13 moment equations [147].”