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Hierarchical reconstruction of 3D well-connected porous media from 2D exemplars using statistics-informed neural network
,
Min Wang ,
Dunhui Xiao,
Shan Zhong ,
Xiangyun Ge ,
Minglu Wu,
Ben Evans
Computer Methods in Applied Mechanics and Engineering, Volume: 410, Start page: 116049
Swansea University Authors:
Jinlong Fu , Ben Evans
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DOI (Published version): 10.1016/j.cma.2023.116049
Abstract
The relationships between porous microstructures and transport properties are of fundamental importance in various scientific and engineering applications. Due to the intricacy, stochasticity and heterogeneity of porous media, reliable characterization and modeling of transport properties often requ...
| Published in: | Computer Methods in Applied Mechanics and Engineering |
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| ISSN: | 0045-7825 |
| Published: |
Elsevier BV
2023
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa63170 |
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| Abstract: |
The relationships between porous microstructures and transport properties are of fundamental importance in various scientific and engineering applications. Due to the intricacy, stochasticity and heterogeneity of porous media, reliable characterization and modeling of transport properties often require a complete dataset of internal microstructure samples. However, it is often an unbearable cost to acquire sufficient 3D digital microstructures by purely using microscopic imaging systems. This paper presents a machine learning-based technique to hierarchically reconstruct 3D well-connected porous microstructures from one isotropic or several anisotropic low-cost 2D exemplar(s). To compactly characterize the large-scale microstructural features, a Gaussian image pyramid is built for each 2D exemplar. Local morphology patterns are collected from the Gaussian image pyramids, and then they serve as the training data to embed the 2D morphological statistics into feed-forward neural networks at multiple length levels. By using a specially-developed morphology integration scheme, the 3D morphological statistics at different levels can be inferred from the statistics-informed neural networks. Gibbs sampling is adopted to hierarchically reconstruct 3D microstructures by using multi-level 3D morphological statistics, where the large-scale, regional and local morphological patterns are statistically generated and successively added to the same 3D random field. The proposed method is tested on a series of porous media with distinct morphologies, and the statistical equivalence between the reconstructed and the real microstructures is systematically evaluated by comparing morphological descriptors and transport properties. The results demonstrate that the proposed 2D-to-3D microstructure reconstruction method is a universal and efficient approach to generating morphologically and physically realistic samples of porous media. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
EPSRC, United Kingdom grant: PURIFY
(E P/V 000756/1) and Swansea University Impact Fund, United Kingdom, and we also would like to acknowledge
the support of the Supercomputing Wales project, which is part-funded by the European Regional Development
Fund (ERDF) via Welsh Government. |
| Start Page: |
116049 |