MERCREDI 18 FEVRIER 2009
14 heures
Salle Séminaire 5
Centre de Physique Théorique
Marseille-Luminy

P. J. Morrison
Department of Physics and Institute for
Fusion Studies, University of Texas, Austin, USA

Title: Building action principles for magnetofluid models

Abstract: An algorithmic prescription is described for building action
principles for plasma magnetofluid models that are extensions of
magnetohydrodynamics. The action principles naturally lead to
physically important invariants and Hamiltonian structure. Also, a
prescription for obtaining reduced fluid models is given. Examples
relevant to laboratory plasma discharges and naturally occurring
plasmas will be presented, including models with gyroviscosity and
generalizations of Ohm's law.