Adaptive Finite Element Relaxation Schemes for Hyperbolic Conservation Laws
Department of Mathematics, University of Crete,
Heraklion 71409, Greece.
2 Institute for Applied and Computational Mathematics, FORTH, Heraklion 71110, Greece.
3 Department of Applied Mathematics, University of Crete, Heraklion 71409, Greece.
Revised: 6 October 2000
We propose and study semidiscrete and fully discrete finite element schemes based on appropriate relaxation models for systems of Hyperbolic Conservation Laws. These schemes are using piecewise polynomials of arbitrary degree and their consistency error is of high order. The methods are combined with an adaptive strategy that yields fine mesh in shock regions and coarser mesh in the smooth parts of the solution. The computational performance of these methods is demonstrated by considering scalar problems and the system of elastodynamics.
Mathematics Subject Classification: 35L65 / 65M60 / 65M50 / 82C40
Key words: Conservation laws / finite elements / adaptive methods.
© EDP Sciences, SMAI, 2001