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An iteratively adaptive multi-scale finite element method for elliptic PDEs with rough coefficients

Hou, Thomas Y. and Hwang, Feng-Nan and Liu, Pengfei and Yao, Chien-Chou (2017) An iteratively adaptive multi-scale finite element method for elliptic PDEs with rough coefficients. Journal of Computational Physics, 336 . pp. 375-400. ISSN 0021-9991. https://resolver.caltech.edu/CaltechAUTHORS:20170427-144329075

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Abstract

We propose an iteratively adaptive Multi-scale Finite Element Method (MsFEM) for elliptic PDEs with rough coefficients. The choice of the local boundary conditions for the multi-sale basis functions determines the accuracy of the MsFEM numerical solution, and one needs to incorporate the global information of the elliptic equation into the local boundary conditions of the multi-scale basis functions to recover the underlying fine-mesh solution of the equation. In our proposed iteratively adaptive method, we achieve this global-to-local information transfer through the combination of coarse-mesh solving using adaptive multi-scale basis functions and fine-mesh smoothing operations. In each iteration step, we first update the multi-scale basis functions based on the approximate numerical solutions of the previous iteration steps, and obtain the coarse-mesh approximate solution using a Galerkin projection. Then we apply several steps of smoothing operations to the coarse-mesh approximate solution on the underlying fine mesh to get the updated approximate numerical solution. The proposed algorithm can be viewed as a nonlinear two-level multi-grid method with the restriction and prolongation operators adapted to the approximate numerical solutions of the previous iteration steps. Convergence analysis of the proposed algorithm is carried out under the framework of two-level multi-grid method, and the harmonic coordinates are employed to establish the approximation property of the adaptive multi-scale basis functions. We demonstrate the efficiency of our proposed multi-scale methods through several numerical examples including a multi-scale coefficient problem, a high-contrast interface problem, and a convection-dominated diffusion problem.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.jcp.2017.02.002DOIArticle
http://www.sciencedirect.com/science/article/pii/S0021999117300955PublisherArticle
ORCID:
AuthorORCID
Liu, Pengfei0000-0002-6714-7387
Additional Information:© 2017 Elsevier Inc. Received 26 June 2015. Received in revised form 28 August 2016. Accepted 2 February 2017. Available online 9 February 2017. This research was in part supported by NSF Grants DMS-1613861, DMS-1318377. The second author was also supported in part by the Ministry of Science and Technology of Taiwan, MOST-104-2115-M-008-011, MOST-105-2115-M-008-007.
Funders:
Funding AgencyGrant Number
NSFDMS-1613861
NSFDMS-1318377
Ministry of Science and Technology (Taipei)MOST-104-2115-M-008-011
Ministry of Science and Technology (Taipei)MOST-105-2115-M-008-007
Subject Keywords:Iteratively adaptive MsFEM; Global-to-local information transfer; Two-level multi-grid method; Elliptic equation with rough coefficients; Convection-dominated diffusion equation
Record Number:CaltechAUTHORS:20170427-144329075
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170427-144329075
Official Citation:Thomas Y. Hou, Feng-Nan Hwang, Pengfei Liu, Chien-Chou Yao, An iteratively adaptive multi-scale finite element method for elliptic PDEs with rough coefficients, Journal of Computational Physics, Volume 336, 1 May 2017, Pages 375-400, ISSN 0021-9991, https://doi.org/10.1016/j.jcp.2017.02.002. (http://www.sciencedirect.com/science/article/pii/S0021999117300955)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77020
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:27 Apr 2017 21:55
Last Modified:09 Mar 2020 13:19

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