Laboratory Experiments and Numerical Model of Scour at Upstream of a Slit Weir
This study presents an experimental measurements and three-dimensional simulation of time-varying scour, along with the variables affecting the resulted scour hole dimensions and evolution at center and side weirs. Slit weir location, crest level, flow rate and sediment size were tested within 34 st...
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| Format: | Article |
| Language: | English |
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University of Technology, Baghdad
2023-09-01
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| Series: | Journal of Applied Sciences and Nanotechnology |
| Subjects: | |
| Online Access: | https://jasn.uotechnology.edu.iq/article_23892_0f171c67f2b73147374e77c64f83cd1c.pdf |
| _version_ | 1797689077670084608 |
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| author | Ruaa Hamdan Aqeel Al-Adili Thamer Mohammed |
| author_facet | Ruaa Hamdan Aqeel Al-Adili Thamer Mohammed |
| author_sort | Ruaa Hamdan |
| collection | DOAJ |
| description | This study presents an experimental measurements and three-dimensional simulation of time-varying scour, along with the variables affecting the resulted scour hole dimensions and evolution at center and side weirs. Slit weir location, crest level, flow rate and sediment size were tested within 34 steady and unsteady flow conditions under various flow rates 125, 95, 62, 50 and 34 L/s to study the scour behavior. All tests were carried out with non-uniform sediments of median sizes 0.24 mm and 0.55 mm. Steel slit weirs of 0.25 m width, 0.004 m thickness, and 0.07, 0.12 and 0.17 m crest level with respect to the mobile bed surface, which was constructed in a laboratory flume made up of brick and concrete within dimensions of (8 m, 1.25 m, and 1 m) long, wide and deep respectively. The present research demonstrates that maximum values of scour volume and scour depth obtained when the weir locate at center of the flume with flat crest for both steady and unsteady flow. Besides, the results indicated a low discrepancy between the experimental measures and the sediment scour model FLOW 3D software, both are showed a good agreement in presenting the scour development accurately as well as the model had excellent ability in predicting the velocity magnitudes at the slit location and the values of shear stress which was hard to measure directly. |
| first_indexed | 2024-03-12T01:39:33Z |
| format | Article |
| id | doaj.art-de4fc539d80a445d9f1cc7fb288852e4 |
| institution | Directory Open Access Journal |
| issn | 2788-6867 |
| language | English |
| last_indexed | 2024-03-12T01:39:33Z |
| publishDate | 2023-09-01 |
| publisher | University of Technology, Baghdad |
| record_format | Article |
| series | Journal of Applied Sciences and Nanotechnology |
| spelling | doaj.art-de4fc539d80a445d9f1cc7fb288852e42023-09-10T16:45:28ZengUniversity of Technology, BaghdadJournal of Applied Sciences and Nanotechnology2788-68672023-09-0133476110.53293/jasn.2023.6199.119923892Laboratory Experiments and Numerical Model of Scour at Upstream of a Slit WeirRuaa Hamdan0Aqeel Al-Adili1Thamer Mohammed2Department of Civil Engineering, University of Technology – IraqMinistry of Water Resources – IraqDepartment of Water Resources Engineering, Collage of Engineering, University of Baghdad – IraqThis study presents an experimental measurements and three-dimensional simulation of time-varying scour, along with the variables affecting the resulted scour hole dimensions and evolution at center and side weirs. Slit weir location, crest level, flow rate and sediment size were tested within 34 steady and unsteady flow conditions under various flow rates 125, 95, 62, 50 and 34 L/s to study the scour behavior. All tests were carried out with non-uniform sediments of median sizes 0.24 mm and 0.55 mm. Steel slit weirs of 0.25 m width, 0.004 m thickness, and 0.07, 0.12 and 0.17 m crest level with respect to the mobile bed surface, which was constructed in a laboratory flume made up of brick and concrete within dimensions of (8 m, 1.25 m, and 1 m) long, wide and deep respectively. The present research demonstrates that maximum values of scour volume and scour depth obtained when the weir locate at center of the flume with flat crest for both steady and unsteady flow. Besides, the results indicated a low discrepancy between the experimental measures and the sediment scour model FLOW 3D software, both are showed a good agreement in presenting the scour development accurately as well as the model had excellent ability in predicting the velocity magnitudes at the slit location and the values of shear stress which was hard to measure directly.https://jasn.uotechnology.edu.iq/article_23892_0f171c67f2b73147374e77c64f83cd1c.pdfscour volumenon-uniform mobile bedslit weirsscour depth |
| spellingShingle | Ruaa Hamdan Aqeel Al-Adili Thamer Mohammed Laboratory Experiments and Numerical Model of Scour at Upstream of a Slit Weir Journal of Applied Sciences and Nanotechnology scour volume non-uniform mobile bed slit weirs scour depth |
| title | Laboratory Experiments and Numerical Model of Scour at Upstream of a Slit Weir |
| title_full | Laboratory Experiments and Numerical Model of Scour at Upstream of a Slit Weir |
| title_fullStr | Laboratory Experiments and Numerical Model of Scour at Upstream of a Slit Weir |
| title_full_unstemmed | Laboratory Experiments and Numerical Model of Scour at Upstream of a Slit Weir |
| title_short | Laboratory Experiments and Numerical Model of Scour at Upstream of a Slit Weir |
| title_sort | laboratory experiments and numerical model of scour at upstream of a slit weir |
| topic | scour volume non-uniform mobile bed slit weirs scour depth |
| url | https://jasn.uotechnology.edu.iq/article_23892_0f171c67f2b73147374e77c64f83cd1c.pdf |
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