The right choice of moment for anisotropic fluid dynamics

We study anisotropic fluid dynamics derived from the Boltzmann equation based on a particular choice for the anisotropic distribution function within a boost-invariant expansion of the fluid in one spatial dimension. In order to close the conservation equations we need to choose an additional moment...

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Bibliographic Details
Published inNuclear physics. A Vol. 967; pp. 409 - 412
Main Authors Niemi, H., Molnár, E., Rischke, D.H.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.11.2017
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Summary:We study anisotropic fluid dynamics derived from the Boltzmann equation based on a particular choice for the anisotropic distribution function within a boost-invariant expansion of the fluid in one spatial dimension. In order to close the conservation equations we need to choose an additional moment of the Boltzmann equation. We discuss the influence of this choice of closure on the time evolution of fluid-dynamical variables and search for the best agreement to the solution of the Boltzmann equation in the relaxation-time approximation.
ISSN:0375-9474
DOI:10.1016/j.nuclphysa.2017.05.038