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Published May 2012 | Published
Journal Article Open

Integration of the EPDiff equation by particle methods

Abstract

The purpose of this paper is to apply particle methods to the numerical solution of the EPDiff equation. The weak solutions of EPDiff are contact discontinuities that carry momentum so that wavefront interactions represent collisions in which momentum is exchanged. This behavior allows for the description of many rich physical applications, but also introduces difficult numerical challenges. We present a particle method for the EPDiff equation that is well-suited for this class of solutions and for simulating collisions between wavefronts. Discretization by means of the particle method is shown to preserve the basic Hamiltonian, the weak and variational structure of the original problem, and to respect the conservation laws associated with symmetry under the Euclidean group. Numerical results illustrate that the particle method has superior features in both one and two dimensions, and can also be effectively implemented when the initial data of interest lies on a submanifold.

Additional Information

© 2012 EDP Sciences, SMAI. Received September 23, 2009. Published online January 11, 2012. Published online by Cambridge University Press: 11 January 2012. The research of A. Chertock is partially supported by NSF grant DMS-0712898. The research of P. Du Toit is partially supported by AFOSR contract FA9550-08-1-0173. The research of J. E. Marsden is partially supported by AFOSR contract FA9550-08-1-0173.

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August 19, 2023
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