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Abstract
Metriplectic dynamics is applied to compute equilibria of fluid dynamical systems. The result is a relaxation method in which Hamiltonian dynamics (symplectic structure) is combined with dissipative mechanisms (metric structure) that relaxes the system to the desired equilibrium point. The specific metric operator, which is considered in this work, is formally analogous to the Landau collision operator. These ideas are illustrated by means of case studies. The considered physical models are the Euler equations in vorticity form, the Grad-Shafranov equation, and force-free MHD equilibria.
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1 Max-Planck-Institute for Plasma Physics, Garching, Germany; Technische Universität München, Zentrum Mathematik, Garching, Germany
2 The University of Texas at Austin, Physics Department and Institute for Fusion Studies, USA