Couple microscale periodic patches to simulate macroscale emergent dynamics
Date
2018
Authors
ALOTAIBI, H.
COX, B.
ROBERTS, A.
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Advisors
Journal Title
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Type:
Journal article
Citation
ANZIAM Journal, 2018; 59(3):313-334
Statement of Responsibility
Hammad Alotaibi, Barry Cox and A.J. Roberts
Conference Name
Abstract
Macroscale “continuum” level predictions are made by a new way to construct computationally efficient “wrappers” around fine-scale, microscopic, detailed descriptions of dynamical systems, such as molecular dynamics. It is often significantly easier to code a microscale simulator with periodicity: so the challenge addressed here is to develop a scheme that uses only a given periodic microscale simulator; specifically, one for atomistic dynamics. Numerical simulations show that applying a suitable proportional controller within “action regions” of a patch of atomistic simulation effectively predicts the macroscale transport of heat. Theoretical analysis establishes that such an approach will generally be effective and efficient, and also determines good values for the strength of the proportional controller. This work has the potential to empower systematic analysis and understanding at a macroscopic system level when only a given microscale simulator is available.
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Data source: Supplementary materials, https://doi.org/10.1017/S1446181117000396
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© Australian Mathematical Society 2018