Hostname: page-component-6898cfcb55-w5hgh Total loading time: 0 Render date: 2026-11-11T21:51:46.654Z Has data issue: false hasContentIssue false

Galerkin approximationwith proper orthogonal decomposition :new error estimates and illustrative examples

Published online by Cambridge University Press:  03 February 2012

Dominique Chapelle
Affiliation:
Inria Rocquencourt Laboratoire Saint-Venant Domaine de Voluceau Rocquencourt, B.P. 105, 78153 Le Chesnay, France. jacques.sainte-marie@inria.fr
Asven Gariah
Affiliation:
Inria Rocquencourt Laboratoire Saint-Venant Domaine de Voluceau Rocquencourt, B.P. 105, 78153 Le Chesnay, France. jacques.sainte-marie@inria.fr
Jacques Sainte-Marie
Affiliation:
Inria Rocquencourt Laboratoire Saint-Venant Domaine de Voluceau Rocquencourt, B.P. 105, 78153 Le Chesnay, France. jacques.sainte-marie@inria.frCETMEF, 2 boulevard Gambetta, 60200 Compiègne, France

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

We propose a numerical analysis of proper orthogonal decomposition (POD) model reductions in which a priori error estimates are expressed in terms of the projection errors that are controlled in the construction of POD bases. These error estimates are derived for generic parabolic evolution PDEs, including with non-linear Lipschitz right-hand sides, and for wave-like equations. A specific projection continuity norm appears in the estimates and – whereas a general uniform continuity bound seems out of reach – we prove that such a bound holds in a variety of Galerkin bases choices. Furthermore, we directly numerically assess this bound – and the effectiveness of the POD approach altogether – for test problems of the type considered in the numerical analysis, and also for more complex equations. Namely, the numerical assessment includes a parabolic equation with super-linear reaction terms, inspired from the FitzHugh-Nagumo electrophysiology model, and a 3D biomechanical heart model. This shows that the effectiveness established for the simpler models is also achieved in the reduced-order simulation of these highly complex systems.

Information

Type
Research Article
Copyright
© EDP Sciences, SMAI, 2012