Hamiltonian Closure and Symmetry

Details Hamiltonian Closure and Symmetry Hamiltonian Closure and Symmetry

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aps..apr.d1022m&link_type=abstract

American Physical Society, APS April Meeting, April 22-26, 2006, abstract #D1.022

Physics

Scientific paper

To obtain fluid theories from kinetic theories requires some kind of closure. Closure can be approximate, as is the case for asymptotic expansions of kinetic theories with collision operators, or can be exact, as is the case for water bags and its generalizations. Collisionless kinetic theories are Hamiltonian and, consequently, this must also be the case for fluid equations obtained by exact closure. A procedure for obtaining exact Hamiltonian closure to all orders will be presented. Also, the manner in which symmetries of kinetic theory induce symmetries of fluid theory will be discussed, in both the exact and approximated contexts.

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