Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/59843
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: Choose inter-element coupling to preserve self-adjoint dynamics in multiscale modelling and computation
Author: Roberts, A.
Citation: Applied Numerical Mathematics, 2010; 60(10):949-973
Publisher: Elsevier Science BV
Issue Date: 2010
ISSN: 0168-9274
Statement of
Responsibility: 
A. J. Roberts
Abstract: Consider the macroscale modelling of microscale spatio-temporal dynamics. Here we develop an approach to ensure coarse scale discrete models preserve important self-adjoint properties of the microscale dynamics. The first part explores the discrete modelling of microscale continuum dynamics in multiple spatial dimensions. The second part addresses how dynamics on a fine lattice are mapped to lattice a factor of two coarser (as in multigrids); for simplicity we address only one-dimensional lattices. Such mapping of discrete lattice dynamics may be iterated to empower future research to explore scale dependent emergent phenomena. The support of the dynamical systems theory of centre manifolds ensures that the coarse scale modelling applies with a finite spectral gap, in a finite domain, and for all time. The accuracy of the modelling is limited by the asymptotic resolution of subgrid scale processes. As given examples demonstrate, the approach developed here ensures the preservation of important symmetries of the microscale dynamics.
Keywords: Multiscale modelling; Centre manifold theory; Closure; Macroscale discretisation
Rights: © 2010 IMACS. Published by Elsevier B.V. All rights reserved.
RMID: 0020098148
DOI: 10.1016/j.apnum.2010.06.002
Grant ID: http://purl.org/au-research/grants/arc/DP0774311
http://purl.org/au-research/grants/arc/DP0988738
Appears in Collections:Applied Mathematics publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.