Conformal conservation laws and geometric integration for damped Hamiltonian PDEs

    Authors

    B. E. Moore; L. Norena;C. M. Schober

    Comments

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    Abbreviated Journal Title

    J. Comput. Phys.

    Keywords

    Multi-symplectic PDE; Linear dissipation; Structure-preserving; algorithm; Preissman box scheme; Discrete gradient methods; NONLINEAR SCHRODINGER-EQUATION; PARTIAL-DIFFERENTIAL-EQUATIONS; KLEIN-GORDON EQUATION; DE-VRIES EQUATION; WAVE-EQUATIONS; RUNGE-KUTTA; NUMERICAL-METHODS; VARIATIONAL INTEGRATORS; SPLITTING METHODS; SCHEMES; Computer Science, Interdisciplinary Applications; Physics, Mathematical

    Abstract

    Conformal conservation laws are defined and derived for a class of multi-symplectic equations with added dissipation. In particular, the conservation laws of energy and momentum are considered, along with those that arise from linear symmetries. Numerical methods that preserve these conformal conservation laws are presented in detail, providing a framework for proving a numerical method exactly preserves the dissipative properties considered. The conformal methods are compared analytically and numerically to standard conservative methods, which includes a thorough inspection of numerical solution behavior for linear equations. Damped Klein-Gordon and sine-Gordon equations, and a damped nonlinear Schrodinger equation, are used as examples to demonstrate the results. (C) 2012 Elsevier Inc. All rights reserved.

    Journal Title

    Journal of Computational Physics

    Volume

    232

    Issue/Number

    1

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    214

    Last Page

    233

    WOS Identifier

    WOS:000310647100015

    ISSN

    0021-9991

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