The right choice of moment for anisotropic fluid dynamics

2017/05/04 by H. Niemi, E. Molnár, D. H. Rischke · 1 citation
Physics and Astronomy · #nucl-th

paper · pdf · doi:10.1016/j.nuclphysa.2017.05.038

4 pages, 4 figures, proceedings for Quark Matter 2017

arxiv created 2017/05/04 · arxiv updated 2018/03/14

Abstract

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.

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