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Numerical simulation of a turbidity current flowing over a solid obstacle
| Content Provider | Semantic Scholar |
|---|---|
| Author | Eghbalzadeh, Afshin Javan, Mitra |
| Abstract | Turbidity currents are often the main process for the transport and deposition of the sediments in narrow dam reservoirs. Turbidity currents with high concentration of suspended sediments follow the thalweg of the lake to the deepest area near the dam, where the sediments can affect the operation of the bottom outlet and the intake structures. The use of solid obstacles is one of the methods for the control of reservoir sedimentation. A two-dimensional (2D) numerical model based on unsteady Reynolds-averaged Navier-Stokes (RANS) equations has been developed for the simulation of turbidity currents driven by non cohesive sediment and flowing over a solid obstacle. The 2D unsteady RANS equations closed by a buoyancy-modified ε − k turbulence model are integrated in time with a second-order fractional step approach. The results of numerical model have been compared with experimental results. The calculated and measured velocity profiles, front velocities, and sediment depositional depth generally are in good agreement. This demonstrates that the present numerical model can be used for further study on the behavior of turbidity currents that encounter solid obstacles. Keywords-component; numerical simulation; turbidity currents; turbulence; dam reservoir |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://ipcbee.com/vol4/45-ICESD2011D20002.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
