Journal
JOURNAL OF COMPUTATIONAL PHYSICS
Volume 231, Issue 4, Pages 1272-1292Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2011.10.008
Keywords
Symplectic methods; Spatial reduction; Pseudo-spectral methods; Hamiltonian systems; Dirac structures; Systems of conservation laws; Open systems
Funding
- project Technologies Logicielles - PARADE
- French Agence Nationale pour la Recherche [ANR-06-TLOG-026]
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A reduction method is presented for systems of conservation laws with boundary energy flow. It is stated as a generalized pseudo-spectral method which performs exact differentiation by using simultaneously several approximation spaces generated by polynomials bases and suitable choices of port-variables. The symplecticity of this spatial reduction method is proved when used for the reduction of both closed and open systems of conservation laws, for any choice of collocation points (i.e. for any polynomial bases). The symplecticity of some more usual collocation schemes is discussed and finally their accuracy on approximation of the spectrum, on the example of the ideal transmission line, is discussed in comparison with the suggested reduction scheme. (C) 2011 Elsevier Inc. All rights reserved.
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