Generalized multiscale finite element methods. nonlinear elliptic equations

Yalchin R. Efendiev, Juan Galvis, Guanglian Li, Michael Presho

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In this paper we use the Generalized Multiscale Finite Element Method (GMsFEM) framework, introduced in [26], in order to solve nonlinear elliptic equations with high-contrast coefficients. The proposed solution method involves linearizing the equation so that coarse-grid quantities of previous solution iterates can be regarded as auxiliary parameters within the problem formulation. With this convention, we systematically construct respective coarse solution spaces that lend themselves to either continuous Galerkin (CG) or discontinuous Galerkin (DG) global formulations. Here, we use Symmetric Interior Penalty Discontinuous Galerkin approach. Both methods yield a predictable error decline that depends on the respective coarse space dimension, and we illustrate the effectiveness of the CG and DG formulations by offering a variety of numerical examples. © 2014 Global-Science Press.
Original languageEnglish (US)
Pages (from-to)733-755
Number of pages23
JournalCommunications in Computational Physics
Issue number3
StatePublished - Jun 3 2015

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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