Volume 52, Number 6, November-December 2018
|Page(s)||2283 - 2306|
|Published online||01 February 2019|
Optimally convergent hybridizable discontinuous Galerkin method for fifth-order Korteweg-de Vries type equations⋆
Department of Mathematics, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA 02747, USA
* Corresponding author: firstname.lastname@example.org
Accepted: 25 May 2018
We develop and analyze the first hybridizable discontinuous Galerkin (HDG) method for solving fifth-order Korteweg-de Vries (KdV) type equations. We show that the semi-discrete scheme is stable with proper choices of the stabilization functions in the numerical traces. For the linearized fifth-order equations, we prove that the approximations to the exact solution and its four spatial derivatives as well as its time derivative all have optimal convergence rates. The numerical experiments, demonstrating optimal convergence rates for both the linear and nonlinear equations, validate our theoretical findings.
Mathematics Subject Classification: 65M60 / 65N30
Key words: Hybridizable discontinuous Galerkin method / fifth-order / Korteweg-de Vries equation / DG
© EDP Sciences, SMAI 2019
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