Linear elliptic equations in composite media with anisotropic fibres

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Abstract

Linear elliptic equations in composite media with anisotropic fibres are concerned. The media consist of a periodic set of anisotropic fibres with low conductivity, included in a connected matrix with high conductivity. Inside the anisotropic fibres, the conductivity in the longitudinal direction is relatively high compared with that in the transverse directions. The coefficients of the elliptic equations depend on the conductivity. This work is to derive the Hölder and the gradient L p estimates (uniformly in the period size of the set of anisotropic fibres as well as in the conductivity ratio of the fibres in the transverse directions to the connected matrix) for the solutions of the elliptic equations. Furthermore, it is shown that, inside the fibres, the solutions have higher regularity along the fibres than in the transverse directions.

Original languageEnglish
Pages (from-to)6580-6620
Number of pages41
JournalJournal of Differential Equations
Volume266
Issue number10
DOIs
StatePublished - 5 May 2019

Keywords

  • Anisotropic fibres
  • Campanato space
  • Longitudinal direction
  • Morrey space
  • Transverse direction

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