Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Preprints and Working Papers
  4. MATHICSE Technical Report : Analytical and numerical study of a modified cell problem for the numerical homogenization of multiscale random fields
 
working paper

MATHICSE Technical Report : Analytical and numerical study of a modified cell problem for the numerical homogenization of multiscale random fields

Abdulle, Assyr  
•
Arjmand, Doghonay  
•
Paganoni, Edoardo  
July 21, 2020

A central question in numerical homogenization of partial differential equations with multiscale coefficients is the accurate computation of effective quantities, such as the homogenized coefficients. Computing homogenized coefficients requires solving local corrector problems followed by upscaling relevant local data. The most naive way of computing homogenized coefficients is by solving a local elliptic problem, which is known to suffer from the so-called resonance error dominating all other errors inherent in multiscale computations. A far more efficient modelling strategy, based on adding an exponential correction term to the standard local elliptic problem, has recently been proved to result in exponentially decaying error bounds with respect to the size of the local geometry. The ques- tions in relation with the accuracy and computational efficiency of this approach has been previously addressed in the context of periodic homogenization. The present article concerns the extension of mathematical and numerical study of this modified elliptic corrector problem to stochastic homog- enization problems. In particular, we assume a stationary, ergodic micro-structure and i) establish the well-posedness of the corrector equation, ii) analyse the bias (or the systematic error) originat- ing from additional exponential correction term in the model. Numerical results corroborating our theoretical findings are presented.

  • Files
  • Details
  • Metrics
Type
working paper
DOI
10.5075/epfl-MATHICSE-281672
Author(s)
Abdulle, Assyr  
Arjmand, Doghonay  
Paganoni, Edoardo  
Corporate authors
MATHICSE-Group
Date Issued

2020-07-21

Publisher

EPFL

Subjects

multiscale methods

•

stochastic homogenization

•

resonance error

•

systematc error

Editorial or Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
ANMC  
Available on Infoscience
November 12, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/173337
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés