Locally conservative finite difference schemes for the modified KdV equation
Autor: | Peter E. Hydon, Gianluca Frasca-Caccia |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
Conservation law
Partial differential equation Computational Mechanics Finite difference method Finite difference Discrete conservation laws Modified KdV equation Numerical Analysis (math.NA) Energy conservation Momentum Computational Mathematics Nonlinear system Finite difference methods Momentum conservation QA297 FOS: Mathematics Applied mathematics Vector field Mathematics - Numerical Analysis Korteweg–de Vries equation Mathematics |
ISSN: | 2158-2491 |
Popis: | Finite difference schemes that preserve two conservation laws of a given partial differential equation can be found directly by a recently-developed symbolic approach. Until now, this has been used only for equations with quadratic nonlinearity. In principle, a simplified version of the direct approach also works for equations with polynomial nonlinearity of higher degree. For the modified Korteweg-de Vries equation, whose nonlinear term is cubic, this approach yields several new families of second-order accurate schemes that preserve mass and either energy or momentum. Two of these families contain Average Vector Field schemes of the type developed by Quispel and co-workers. Numerical tests show that each family includes schemes that are highly accurate compared to other mass-preserving methods that can be found in the literature. |
Databáze: | OpenAIRE |
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