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  4. The Laguerre model of grain growth in two dimensions II. Examples of coarsening simulations
 
research article

The Laguerre model of grain growth in two dimensions II. Examples of coarsening simulations

Telley, Hubert
•
Mocellin, Alain
•
Liebling, Thomas M.  
1996
Philosophical Magazine B

The basic concepts of a deterministic scheme for simulating grain growth or foam coarsening in two dimensions have been presented in Part I. Implementation of the corresponding Laguerre (or weighted Voronoi) diagram in computer manageable practical terms is now presented. The internal constituents of the model are discussed first and include the initial configurations of the cellular network, obtained from different schemes. An internal clock is designed and an arbitrary dimensionless parameter is introduced to provide a relative weight to the rates of change of the generating circle positions with those of their sizes. A criterion for evaluating robustness and consistency of simulations is also presented. Actual simulation experiments are subsequently described as conducted from a range of initial structures built from different numbers of cells-up to 10^5. The essential theoretical attributes of normal grain growth were found to be recoverable in all simulations, notably statistical self-similarity, parabolic kinetic law, and independence from initial structures. It was also found that varying the relative rates of change of circle positions with radii (via the corresponding internal parameter mentioned above) resulted in size and shape distributions ranging from foam-like to polycrystal-like behaviours. It is claimed finally that the present model can be extended to three dimensions without any basic difficulty.

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Type
research article
DOI
10.1080/13642819608239126
Web of Science ID

WOS:A1996UE04300002

Author(s)
Telley, Hubert
Mocellin, Alain
Liebling, Thomas M.  
Date Issued

1996

Published in
Philosophical Magazine B
Volume

73

Issue

3

Start page

409

End page

427

Note

PRO 96.03

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
ROSO  
Available on Infoscience
February 13, 2006
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/222811
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