Study on the REV Size of Fractured Rock in the Non-Darcy Flow Based on the Dual-Porosity Model
For the problem of whether the representative elementary volume (REV) obtained in the Darcy flow is also applicable to the case of the non-Darcy flow, the study on the REV size within the non-Darcy flow is proposed tentatively. The concept of the REV in the non-Darcy flow is based on the definition...
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| Language: | English |
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Wiley
2018-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2018/7535927 |
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| author | Yuan Wang Yu-long Niu Qiang Feng |
| author_facet | Yuan Wang Yu-long Niu Qiang Feng |
| author_sort | Yuan Wang |
| collection | DOAJ |
| description | For the problem of whether the representative elementary volume (REV) obtained in the Darcy flow is also applicable to the case of the non-Darcy flow, the study on the REV size within the non-Darcy flow is proposed tentatively. The concept of the REV in the non-Darcy flow is based on the definition of the REV. According to the determination of the REV in the Darcy flow, the intrinsic permeability k and non-Darcy coefficient β are used simultaneously for the determination of the REV in the non-Darcy flow. The pore pressure cohesive element (PPCE) is developed with the subroutine in ABAQUS. Then the simulation method of the Darcy and non-Darcy flow in the fractured rock mass is built using the PPCE. The proposed plan is examined through the comparison with existing research results. It is validated that this technic is efficient and accurate in simulating the Darcy and non-Darcy flow in the fractured rock mass. Combined with fracture networks generated by Monte Carlo Simulation technique, the PPCE is applied to the study on the REV size. Both conditions of the Darcy and non-Darcy flow are simulated for comparison. The simulation results of this model show that the REV of the non-Darcy flow is inconsistent with the REV of the Darcy flow, and the REV of the non-Darcy flow is more significant than the REV of the Darcy flow. The intrinsic permeability k tensors obtained in the Darcy flow and the non-Darcy flow are basically the same. |
| format | Article |
| id | doaj-art-042c5f8c47c743d9bb4a69bb50136338 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-042c5f8c47c743d9bb4a69bb501363382025-02-03T01:26:10ZengWileyGeofluids1468-81151468-81232018-01-01201810.1155/2018/75359277535927Study on the REV Size of Fractured Rock in the Non-Darcy Flow Based on the Dual-Porosity ModelYuan Wang0Yu-long Niu1Qiang Feng2Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaFor the problem of whether the representative elementary volume (REV) obtained in the Darcy flow is also applicable to the case of the non-Darcy flow, the study on the REV size within the non-Darcy flow is proposed tentatively. The concept of the REV in the non-Darcy flow is based on the definition of the REV. According to the determination of the REV in the Darcy flow, the intrinsic permeability k and non-Darcy coefficient β are used simultaneously for the determination of the REV in the non-Darcy flow. The pore pressure cohesive element (PPCE) is developed with the subroutine in ABAQUS. Then the simulation method of the Darcy and non-Darcy flow in the fractured rock mass is built using the PPCE. The proposed plan is examined through the comparison with existing research results. It is validated that this technic is efficient and accurate in simulating the Darcy and non-Darcy flow in the fractured rock mass. Combined with fracture networks generated by Monte Carlo Simulation technique, the PPCE is applied to the study on the REV size. Both conditions of the Darcy and non-Darcy flow are simulated for comparison. The simulation results of this model show that the REV of the non-Darcy flow is inconsistent with the REV of the Darcy flow, and the REV of the non-Darcy flow is more significant than the REV of the Darcy flow. The intrinsic permeability k tensors obtained in the Darcy flow and the non-Darcy flow are basically the same.http://dx.doi.org/10.1155/2018/7535927 |
| spellingShingle | Yuan Wang Yu-long Niu Qiang Feng Study on the REV Size of Fractured Rock in the Non-Darcy Flow Based on the Dual-Porosity Model Geofluids |
| title | Study on the REV Size of Fractured Rock in the Non-Darcy Flow Based on the Dual-Porosity Model |
| title_full | Study on the REV Size of Fractured Rock in the Non-Darcy Flow Based on the Dual-Porosity Model |
| title_fullStr | Study on the REV Size of Fractured Rock in the Non-Darcy Flow Based on the Dual-Porosity Model |
| title_full_unstemmed | Study on the REV Size of Fractured Rock in the Non-Darcy Flow Based on the Dual-Porosity Model |
| title_short | Study on the REV Size of Fractured Rock in the Non-Darcy Flow Based on the Dual-Porosity Model |
| title_sort | study on the rev size of fractured rock in the non darcy flow based on the dual porosity model |
| url | http://dx.doi.org/10.1155/2018/7535927 |
| work_keys_str_mv | AT yuanwang studyontherevsizeoffracturedrockinthenondarcyflowbasedonthedualporositymodel AT yulongniu studyontherevsizeoffracturedrockinthenondarcyflowbasedonthedualporositymodel AT qiangfeng studyontherevsizeoffracturedrockinthenondarcyflowbasedonthedualporositymodel |