Motivated by applications to numerical simulations of flows in highly heterogeneous porous media, we develop multiscale finite element methods for second order elliptic equations. We discuss a multiscale model reduction technique in the framework of the discontinuous Galerkin finite element method. We propose two different finite element spaces on the coarse mesh. The first space is based on a local eigenvalue problem that uses an interior weighted L2-norm and a boundary weighted L2-norm for computing the "mass" matrix. The second choice is based on generation of a snapshot space and subsequent selection of a subspace of a reduced dimension. The approximation with these multiscale spaces is based on the discontinuous Galerkin finite element method framework. We investigate the stability and derive error estimates for the methods and further experimentally study their performance on a representative number of numerical examples. © 2013 Elsevier Inc.
|Original language||English (US)|
|Number of pages||15|
|Journal||Journal of Computational Physics|
|State||Published - Dec 2013|
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Y.E.'s work is partially supported by the US DoD, DOE and NSF (DMS 0934837, DMS 0724704, and DMS 0811180).J. Galvis would like to acknowledge partial support from DOE. R. Lazarov's research was supported in parts by NSF (DMS 1016525).
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Computer Science Applications