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Asynchronous coupling of hybrid models for efficient simulation of multiscale systems
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Lockerby, Duncan A., Patronis, Alexander, Borg, Matthew K. and Reese, Jason M. (2014) Asynchronous coupling of hybrid models for efficient simulation of multiscale systems. Journal of Computational Physics, 284 . pp. 261-272. doi:10.1016/j.jcp.2014.12.035 ISSN 0021-9991.
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Official URL: http://dx.doi.org/10.1016/j.jcp.2014.12.035
Abstract
We present a new coupling approach for the time advancement of multi-physics models of multiscale systems. This extends the method of E et al. (2009) [5] to deal with an arbitrary number of models. Coupling is performed asynchronously, with each model being assigned its own timestep size. This enables accurate long timescale predictions to be made at the computational cost of the short timescale simulation. We propose a method for selecting appropriate timestep sizes based on the degree of scale separation that exists between models. A number of example applications are used for testing and benchmarking, including a comparison with experimental data of a thermally driven rarefied gas flow in a micro capillary. The multiscale simulation results are in very close agreement with the experimental data, but are produced almost 50,000 times faster than from a conventionally-coupled simulation.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Library of Congress Subject Headings (LCSH): | Multiscale modeling | ||||||||
Journal or Publication Title: | Journal of Computational Physics | ||||||||
Publisher: | Academic Press Inc. Elsevier Science | ||||||||
ISSN: | 0021-9991 | ||||||||
Official Date: | 24 December 2014 | ||||||||
Dates: |
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Volume: | 284 | ||||||||
Number of Pages: | 12 | ||||||||
Page Range: | pp. 261-272 | ||||||||
DOI: | 10.1016/j.jcp.2014.12.035 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 18 February 2016 | ||||||||
Date of first compliant Open Access: | 18 February 2016 | ||||||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||||||
Grant number: | EP/I011927/1 (EPSRC), EP/K038664/1 (EPSRC), and EP/K038621/1 (EPSRC) |
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