Englisch

Workshop Numerische Analysis singulär gestörter Probleme
(anlässlich des 60. Geburtstages von Martin Stynes)

Workshop singulär gestörter Probleme

Vorträge & Folien

Remarks on asymptotic expansions for singularly perturbed second order ODEs with multiple scales

Jens Markus Melenk (Institut fuer Analysis und Scientific Computing, TU Wien)

We consider systems of two coupled second order two point bvps with two singular perturbation parameters. For the "elliptic-elliptic" case (i.e., the equation does not involve first order terms) full asymptotic are presented that cover the full range of the two singular perturbation parameters. As an application, we show that hp-FEM can converge at a robust exponential rate (in the energy norm) on suitably designed meshes.
We will also discuss the case of "strongly coupled systems" and derive for a model situation the asymptotic expansions that reveal the layer structure.

The results presented are joint work with C. Xenophontos (Cyprus) and B. Pichler (Vienna).

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Stand: 21. November 2011