Numerical simulations of unsteady flow field and non-uniform and non-equilibrium sediment transport in river bend
Flow in river usually has a 3 dimensional character. While 3 dimensional flow simulations is time consuming process, enhanced 2D numerical modeling with depth and width averaged are introduced. In this article using field data, numerical simulation of unsteady flow field and non-uniform and non-equi...
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| Format: | Article |
| Language: | fas |
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Marvdasht Branch, Islamic Azad University
2020-07-01
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| Series: | مهندسی منابع آب |
| Subjects: | |
| Online Access: | https://wej.marvdasht.iau.ir/article_4222_7daf1a4a21fe9ef822a54b1e15869f6d.pdf |
| _version_ | 1797359689876373504 |
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| author | Mohsen Maghrebi Seyyed Ali Akbar Salehi Neyshaboori |
| author_facet | Mohsen Maghrebi Seyyed Ali Akbar Salehi Neyshaboori |
| author_sort | Mohsen Maghrebi |
| collection | DOAJ |
| description | Flow in river usually has a 3 dimensional character. While 3 dimensional flow simulations is time consuming process, enhanced 2D numerical modeling with depth and width averaged are introduced. In this article using field data, numerical simulation of unsteady flow field and non-uniform and non-equilibrium sediment transport in one reach of Karon River with length of 5.2 km for duration more than 6 years is performed using CCHE2D numerical model. Numerical outputs clearly demonstrate that CCHE2D numerical model can predict flow field in the study area. also the flow field analysis clearly demonstrate that high shear stress and high velocity has different zonal location and sediment transport analysis shows that van Raijn (1984) formula for adaptation length for bed load and Wee (1999) formula for adaptation factor for suspended load can better predict the bed change in the study area with good accuracy. Moreover the software accuracy for bed change varies between 11.045% to 68.07% in the study area. |
| first_indexed | 2024-03-08T15:27:21Z |
| format | Article |
| id | doaj.art-4e326d0023794b6ba3bece4b8e38fbe3 |
| institution | Directory Open Access Journal |
| issn | 2008-6377 2423-7191 |
| language | fas |
| last_indexed | 2024-03-08T15:27:21Z |
| publishDate | 2020-07-01 |
| publisher | Marvdasht Branch, Islamic Azad University |
| record_format | Article |
| series | مهندسی منابع آب |
| spelling | doaj.art-4e326d0023794b6ba3bece4b8e38fbe32024-01-10T08:11:14ZfasMarvdasht Branch, Islamic Azad Universityمهندسی منابع آب2008-63772423-71912020-07-011345184222Numerical simulations of unsteady flow field and non-uniform and non-equilibrium sediment transport in river bendMohsen Maghrebi0Seyyed Ali Akbar Salehi Neyshaboori1Professor of Hydraulic Structure, Tarbiat Modares UniversitySchool of Enviroment, College of Engineering, University of Tehran, IranFlow in river usually has a 3 dimensional character. While 3 dimensional flow simulations is time consuming process, enhanced 2D numerical modeling with depth and width averaged are introduced. In this article using field data, numerical simulation of unsteady flow field and non-uniform and non-equilibrium sediment transport in one reach of Karon River with length of 5.2 km for duration more than 6 years is performed using CCHE2D numerical model. Numerical outputs clearly demonstrate that CCHE2D numerical model can predict flow field in the study area. also the flow field analysis clearly demonstrate that high shear stress and high velocity has different zonal location and sediment transport analysis shows that van Raijn (1984) formula for adaptation length for bed load and Wee (1999) formula for adaptation factor for suspended load can better predict the bed change in the study area with good accuracy. Moreover the software accuracy for bed change varies between 11.045% to 68.07% in the study area.https://wej.marvdasht.iau.ir/article_4222_7daf1a4a21fe9ef822a54b1e15869f6d.pdfnon-equilibrium sediment transportcche2d numerical modelflow fieldriver bendkaron river |
| spellingShingle | Mohsen Maghrebi Seyyed Ali Akbar Salehi Neyshaboori Numerical simulations of unsteady flow field and non-uniform and non-equilibrium sediment transport in river bend مهندسی منابع آب non-equilibrium sediment transport cche2d numerical model flow field river bend karon river |
| title | Numerical simulations of unsteady flow field and non-uniform and non-equilibrium sediment transport in river bend |
| title_full | Numerical simulations of unsteady flow field and non-uniform and non-equilibrium sediment transport in river bend |
| title_fullStr | Numerical simulations of unsteady flow field and non-uniform and non-equilibrium sediment transport in river bend |
| title_full_unstemmed | Numerical simulations of unsteady flow field and non-uniform and non-equilibrium sediment transport in river bend |
| title_short | Numerical simulations of unsteady flow field and non-uniform and non-equilibrium sediment transport in river bend |
| title_sort | numerical simulations of unsteady flow field and non uniform and non equilibrium sediment transport in river bend |
| topic | non-equilibrium sediment transport cche2d numerical model flow field river bend karon river |
| url | https://wej.marvdasht.iau.ir/article_4222_7daf1a4a21fe9ef822a54b1e15869f6d.pdf |
| work_keys_str_mv | AT mohsenmaghrebi numericalsimulationsofunsteadyflowfieldandnonuniformandnonequilibriumsedimenttransportinriverbend AT seyyedaliakbarsalehineyshaboori numericalsimulationsofunsteadyflowfieldandnonuniformandnonequilibriumsedimenttransportinriverbend |