Numerical Simulation of Density Current Evolution in a Diverging Channel
When a buoyant inflow of higher density enters a reservoir, it sinks below the ambient water and forms an underflow. Downstream of the plunge point, the flow becomes progressively diluted due to the fluid entrainment. This study seeks to explore the ability of 2D width-averaged unsteady Reynolds-ave...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/729597 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832563687204847616 |
|---|---|
| author | Mitra Javan Afshin Eghbalzadeh Masoud Montazeri Namin |
| author_facet | Mitra Javan Afshin Eghbalzadeh Masoud Montazeri Namin |
| author_sort | Mitra Javan |
| collection | DOAJ |
| description | When a buoyant inflow of higher density enters a reservoir, it sinks below the ambient water and forms an underflow. Downstream of the plunge point, the flow becomes progressively diluted due to the fluid entrainment. This study seeks to explore the ability of 2D width-averaged unsteady Reynolds-averaged Navier-Stokes (RANS) simulation approach for resolving density currents in an inclined diverging channel. 2D width-averaged unsteady RANS equations closed by a buoyancy-modified 𝑘−𝜀 turbulence model are integrated in time with a second-order fractional step approach coupled with a direct implicit method and discretized in space on a staggered mesh using a second-order accurate finite volume approach incorporating a high-resolution semi-Lagrangian technique for the convective terms. A series of 2D width-averaged unsteady simulations is carried out for density currents. Comparisons with the experimental measurements and the other numerical simulations show that the predictions of velocity and density field are with reasonable accuracy. |
| format | Article |
| id | doaj-art-14b4b5c7429740e0927b6f2e6d690af8 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-14b4b5c7429740e0927b6f2e6d690af82025-02-03T01:12:48ZengWileyAdvances in Civil Engineering1687-80861687-80942012-01-01201210.1155/2012/729597729597Numerical Simulation of Density Current Evolution in a Diverging ChannelMitra Javan0Afshin Eghbalzadeh1Masoud Montazeri Namin2Department of Civil Engineering, Razi University, Kermanshah, IranDepartment of Civil Engineering, Razi University, Kermanshah, IranDepartment of Civil Engineering, University of Tehran, Tehran, IranWhen a buoyant inflow of higher density enters a reservoir, it sinks below the ambient water and forms an underflow. Downstream of the plunge point, the flow becomes progressively diluted due to the fluid entrainment. This study seeks to explore the ability of 2D width-averaged unsteady Reynolds-averaged Navier-Stokes (RANS) simulation approach for resolving density currents in an inclined diverging channel. 2D width-averaged unsteady RANS equations closed by a buoyancy-modified 𝑘−𝜀 turbulence model are integrated in time with a second-order fractional step approach coupled with a direct implicit method and discretized in space on a staggered mesh using a second-order accurate finite volume approach incorporating a high-resolution semi-Lagrangian technique for the convective terms. A series of 2D width-averaged unsteady simulations is carried out for density currents. Comparisons with the experimental measurements and the other numerical simulations show that the predictions of velocity and density field are with reasonable accuracy.http://dx.doi.org/10.1155/2012/729597 |
| spellingShingle | Mitra Javan Afshin Eghbalzadeh Masoud Montazeri Namin Numerical Simulation of Density Current Evolution in a Diverging Channel Advances in Civil Engineering |
| title | Numerical Simulation of Density Current Evolution in a Diverging Channel |
| title_full | Numerical Simulation of Density Current Evolution in a Diverging Channel |
| title_fullStr | Numerical Simulation of Density Current Evolution in a Diverging Channel |
| title_full_unstemmed | Numerical Simulation of Density Current Evolution in a Diverging Channel |
| title_short | Numerical Simulation of Density Current Evolution in a Diverging Channel |
| title_sort | numerical simulation of density current evolution in a diverging channel |
| url | http://dx.doi.org/10.1155/2012/729597 |
| work_keys_str_mv | AT mitrajavan numericalsimulationofdensitycurrentevolutioninadivergingchannel AT afshineghbalzadeh numericalsimulationofdensitycurrentevolutioninadivergingchannel AT masoudmontazerinamin numericalsimulationofdensitycurrentevolutioninadivergingchannel |