Year: 2014
Type: preprint
Abstract: In this paper we develop a multiscale method to solve problems in complicated porous microstructures with Neumann boundary conditions. By using a coarse-grid quasi-interpolation operator to define a fine detail space and local orthogonal decomposition, we construct multiscale corrections to coarse-grid basis functions with microstructure. By truncating the corrector functions we are able to make a computationally efficient scheme. Error results and analysis are presented. A key component of this analysis is the investigation of the Poincaré constants in perforated domains as they may contain micro-structural information. Using a constructive method originally developed for weighted Poincaré inequalities, we are able to obtain estimates on Poincaré constants with respect to scale and separation length of the pores. Finally, two numerical examples are presented to verify our estimates.
Source: arXiv (Cornell University)
Authors: Brown, Donald L., Peterseim, Daniel
Institutions: University of Bonn, Numerical Method (China)
Language: English
Subfield: Computational Theory and Mathematics
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2950786767