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Representative elementary volume evaluation of coal microstructure based on CT 3D reconstruction by Wei Liu; Dongyang Han; Gang Wang; Xiangyu Chu is a Engineering article available to read on EtoBox.

What is Representative elementary volume evaluation of coal microstructure based on CT 3D reconstruction about?

CT scanning is an essential means to evaluate coal microstructure for its non-destructive quantization and visualization. However, the original images obtained by CT scanning are computationally expensive and challenging to analyze. Due to the self-similarity of the coal microstructure, analyzing the representative elementary volume (REV) of digital rock can help to establish representative results. In this work, we analyze the REV of eight coal samples using micro-CT with resolutions of 0.7, 1.5, and 9.5 μm. Furthermore, the relationships between model sizes and pore structure properties are systematically established in terms of heterogeneity, anisotropy, porosity, fractal dimension, pore size, tortuosity and permeability. Results show that most coal samples have a definite REV for pore structure parameters under high image resolution, while it is difficult to determine the REV for describing fluid flow. Specifically, the anisotropy, porosity, fractal dimension, and mean pore sizes tend to be stable, and the maximum pore sizes increase with increasing model sizes. There is no distinct rule between the tortuosity and model sizes, while the tortuosity gradient error gradually stabi

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Author

Wei Liu; Dongyang Han; Gang Wang; Xiangyu Chu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)