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Boundary layer tails in periodic homogenization

Published online by Cambridge University Press:  15 August 2002

Grégoire Allaire
Affiliation:
Laboratoire d'Analyse Numérique, Université Pierre et Marie Curie, Paris VI, Tour 55–65, 4 place Jussieu, 70005 Paris, France; allaire@ann.jussieu.fr.
Micol Amar
Affiliation:
Dipartimento Me.Mo.Mat, Università “La Sapienza" - Roma, Via A. Scarpa 16, 00161 Roma, Italy; amar@dmmm.uniroma1.it.
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Abstract

This paper focus on the properties of boundary layersin periodic homogenization inrectangular domains which are eitherfixed or have an oscillating boundary. Such boundary layers arehighly oscillating near the boundary and decay exponentially fastin the interior to a non-zero limit that we call boundary layertail. The influence of these boundary layer tails on interiorerror estimates is emphasized. They mainly havetwo effects (at first order with respect to the period ε): first,they add a dispersive term to the homogenized equation, and second,they yield an effective Fourier boundary condition.

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Type
Research Article
Copyright
© EDP Sciences, SMAI, 1999

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