Adaptive multiscale model reduction with generalized multiscale finite element methods

E Chung, Y Efendiev, TY Hou - Journal of Computational Physics, 2016 - Elsevier
In this paper, we discuss a general multiscale model reduction framework based on
multiscale finite element methods. We give a brief overview of related multiscale methods …

Constraint energy minimizing generalized multiscale finite element method

ET Chung, Y Efendiev, WT Leung - Computer Methods in Applied …, 2018 - Elsevier
In this paper, we propose Constraint Energy Minimizing Generalized Multiscale Finite
Element Method (CEM-GMsFEM). The main goal of this paper is to design multiscale basis …

Mixed generalized multiscale finite element methods and applications

ET Chung, Y Efendiev, CS Lee - Multiscale Modeling & Simulation, 2015 - SIAM
In this paper, we present a mixed generalized multiscale finite element method (GMsFEM)
for solving flow in heterogeneous media. Our approach constructs multiscale basis functions …

Non-local multi-continua upscaling for flows in heterogeneous fractured media

ET Chung, Y Efendiev, WT Leung, M Vasilyeva… - Journal of …, 2018 - Elsevier
In this paper, we propose a rigorous and accurate non-local (in the oversampled region)
upscaling framework based on some recently developed multiscale methods [10]. Our …

An adaptive GMsFEM for high-contrast flow problems

ET Chung, Y Efendiev, G Li - Journal of Computational Physics, 2014 - Elsevier
In this paper, we derive an a-posteriori error indicator for the Generalized Multiscale Finite
Element Method (GMsFEM) framework. This error indicator is further used to develop an …

Deep multiscale model learning

Y Wang, SW Cheung, ET Chung, Y Efendiev… - Journal of …, 2020 - Elsevier
The objective of this paper is to design novel multi-layer neural networks for multiscale
simulations of flows taking into account the observed fine data and physical modeling …

Residual-driven online generalized multiscale finite element methods

ET Chung, Y Efendiev, WT Leung - Journal of Computational Physics, 2015 - Elsevier
The construction of local reduced-order models via multiscale basis functions has been an
area of active research. In this paper, we propose online multiscale basis functions which …

Efficient deep learning techniques for multiphase flow simulation in heterogeneous porousc media

Y Wang, G Lin - Journal of Computational Physics, 2020 - Elsevier
We present efficient deep learning techniques for approximating flow and transport
equations for both single phase and two-phase flow problems. The proposed methods take …

Generalized multiscale finite element methods for problems in perforated heterogeneous domains

ET Chung, Y Efendiev, G Li, M Vasilyeva - Applicable Analysis, 2016 - Taylor & Francis
Complex processes in perforated domains occur in many real-world applications. These
problems are typically characterized by physical processes in domains with multiple scales …

Generalized multiscale finite-element method (GMsFEM) for elastic wave propagation in heterogeneous, anisotropic media

K Gao, S Fu, RL Gibson Jr, ET Chung… - Journal of Computational …, 2015 - Elsevier
It is important to develop fast yet accurate numerical methods for seismic wave propagation
to characterize complex geological structures and oil and gas reservoirs. However, the …