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Solution of Non-linear Dispersive Wave Problems Using a Moving Finite Element Method

Wacher, Abigail; Givoli, Dan

Authors

Abigail Wacher

Dan Givoli



Abstract

The solution of the fully non-linear time-dependent two-dimensional shallow water equations is considered. Dispersive effects due to the Coriolis forces are taken into account. Such effects are of major importance in geophysical fluid dynamics applications. The recently proposed string gradient weighted moving finite element method is extended for this class of problems. This method simultaneously determines, at each time step, the solution of the governing partial differential equations and an optimal location of the finite element nodes. It has previously been applied to non-dispersive wave problems; here its performance under the demanding conditions of large Coriolis forces, inducing large mesh and field rotation, is studied. Optimal rates of convergence are obtained. Results for some example problems of water hump release are presented. Non-linear and linearized solutions are compared.

Citation

Wacher, A., & Givoli, D. (2007). Solution of Non-linear Dispersive Wave Problems Using a Moving Finite Element Method. Communications in numerical methods in engineering, 23(4), 253-262. https://doi.org/10.1002/cnm.897

Journal Article Type Article
Publication Date Apr 1, 2007
Deposit Date Jan 26, 2011
Journal Communications in Numerical Methods in Engineering
Print ISSN 1069-8299
Electronic ISSN 1099-0887
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 23
Issue 4
Pages 253-262
DOI https://doi.org/10.1002/cnm.897
Keywords Moving finite elements, Shallow water equations, Coriolis, Wave dispersion, Non-linear waves, Rotation.

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