| Autor: |
Mostafa Fourar, Sing-Ki Xavier Choi, Pathegama Gamage Ranjith |
| Rok vydání: |
2006 |
| Předmět: |
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| Zdroj: |
International Journal of Rock Mechanics and Mining Sciences. 43:216-223 |
| ISSN: |
1365-1609 |
| DOI: |
10.1016/j.ijrmms.2005.06.001 |
| Popis: |
An experimental study using a triaxial apparatus was used to analyze the two-phase flow patterns in jointed rock specimens. Rock specimens having a single natural fracture were tested for two-phase flow of water and air. Triaxial tests were conducted to characterize the two-phase flow through fractured granite specimens at low confining pressures. It was found that for a relatively smooth joint (JRC 0.25 MPa) gas injection pressures, the gas occupied the main part of the fracture and the liquid was able to flow as an unstable film forming an annular flow along the joint. When the annular flow developed, the mixture flow pattern was independent of the air flow velocity. This was due to the fact that once the injected air velocity reached a critical value (i.e., 20 m/s), water velocity inside the joint was negligible for a given confining pressure and injected water pressure. Further increase in inlet air pressures developed a single-phase air flow with no water flow. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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