Model Reduction of Kinetic Equations by Operator Projection

Yuwei Fan*, Julian Koellermeier, Jun Li, Ruo Li, Manuel Torrilhon

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

27 Citaten (Scopus)


By a further study of the mechanism of the hyperbolic regularization of the moment system for the Boltzmann equation proposed in Cai et al. (Commun Math Sci 11(2):547–571, 2013), we point out that the key point is treating the time and space derivative in the same way. Based on this understanding, a uniform framework to derive globally hyperbolic moment systems from kinetic equations using an operator projection method is proposed. The framework is so concise and clear that it can be treated as an algorithm with four inputs to derive hyperbolic moment systems by routine calculations. Almost all existing globally hyperbolic moment systems can be included in the framework, as well as some new moment systems including globally hyperbolic regularized versions of Grad’s ordered moment systems and a multi-dimensional extension of the quadrature-based moment system.
Originele taal-2English
Pagina's (van-tot)457–486
Aantal pagina's30
TijdschriftJournal of Statistical Physics
StatusPublished - 2016
Extern gepubliceerdJa

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