Expanded Mixed Multiscale Finite Element Methods and Their Applications for Flows in Porous Media

L. Jiang, D. Copeland, J. D. Moulton

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We develop a family of expanded mixed multiscale finite element methods (MsFEMs) and their hybridizations for second-order elliptic equations. This formulation expands the standard mixed multiscale finite element formulation in the sense that four unknowns (hybrid formulation) are solved simultaneously: pressure, gradient of pressure, velocity, and Lagrange multipliers. We use multiscale basis functions for both the velocity and the gradient of pressure. In the expanded mixed MsFEM framework, we consider both separable and nonseparable spatial scales. Specifically, we analyze the methods in three categories: periodic separable scales, G-convergent separable scales, and a continuum of scales. When there is no scale separation, using some global information can significantly improve the accuracy of the expanded mixed MsFEMs. We present a rigorous convergence analysis of these methods that includes both conforming and nonconforming formulations. Numerical results are presented for various multiscale models of flow in porous media with shale barriers that illustrate the efficacy of the proposed family of expanded mixed MsFEMs. © 2012 Society for Industrial and Applied Mathematics.
Original languageEnglish (US)
Pages (from-to)418-450
Number of pages33
JournalMultiscale Modeling & Simulation
Volume10
Issue number2
DOIs
StatePublished - Jan 2012
Externally publishedYes

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