| Autor: |
Nanda, Kamal, Mufti, Suaiba, Das, Arghya, Misra, Santanu |
| Předmět: |
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| Zdroj: |
Journal of Earth System Science; Mar2024, Vol. 133 Issue 1, p1-10, 10p |
| Abstrakt: |
We simulate cataclastic flow deformation using discrete elements for high porous Bentheim sandstone under 1D compression and high confinement (~300 MPa) to assess the flow path and permeability evolution during cataclasis. The model accounts for particle crushing by replacing balls with smaller fragments and cement damage by removing existing bonds beyond a threshold stress level. The particle packing in the deformed numerical specimens is further analysed using an image processing tool to extract the pore structure. The analysis suggests that beyond 10% particle breakage, there is a decreasing trend in tortuosity, indicating the crushed finer fragments enable additional flow channels. The same is quantitatively ascertained through pore coordination number and visual identification. The overall analysis implies that during the compression under high confinement, the rate of permeability reduction depends on the flow path evolution due to crushing, and tortuosity can decrease due to excessive crushing. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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