Flow Pattern and Erosion in a 90-Degrees Sharp Bend around a W−Weir
Different flow-altering methods, such as W−Weirs, have been developed to reduce erosion. For this study, we performed two experiments: (1) installing a W−Weir in various positions to determine the best angle for placement, and (2) investigating the variation of flow patterns and bed shear stress dis...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/1/11 |
| _version_ | 1797431139112058880 |
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| author | Vida Atashi Mahmood Shafai Bejestan Yeo Howe Lim |
| author_facet | Vida Atashi Mahmood Shafai Bejestan Yeo Howe Lim |
| author_sort | Vida Atashi |
| collection | DOAJ |
| description | Different flow-altering methods, such as W−Weirs, have been developed to reduce erosion. For this study, we performed two experiments: (1) installing a W−Weir in various positions to determine the best angle for placement, and (2) investigating the variation of flow patterns and bed shear stress distribution in a 90-degree sharp bend by measuring the 3D components of flow velocities, with and without W−Weirs, where the greatest scour depth occurs. The results from the three installation angles indicate that less scour depth and volume of sediment removal occur when the weir is located close to the end of a bend. In addition, the value of the secondary circular power without a weir was higher than the position with a weir; however, this value significantly increased at 70 degrees due to turbulence flow near the W−Weir. This secondary flow power reduction at 45 degrees with a W−Weir increased by 65.8 percent for a Froude number value of 0.17, and by 29.8 percent for a Froude number value of 0.28, compared to values without the W−Weir, respectively. |
| first_indexed | 2024-03-09T09:37:36Z |
| format | Article |
| id | doaj.art-4291813a502c41888c5973f7aaf80194 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T09:37:36Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-4291813a502c41888c5973f7aaf801942023-12-02T01:13:00ZengMDPI AGWater2073-44412022-12-011511110.3390/w15010011Flow Pattern and Erosion in a 90-Degrees Sharp Bend around a W−WeirVida Atashi0Mahmood Shafai Bejestan1Yeo Howe Lim2Department of Civil Engineering, University of North Dakota, Grand Forks, ND 58202, USAFaculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz 61357-43311, IranDepartment of Civil Engineering, University of North Dakota, Grand Forks, ND 58202, USADifferent flow-altering methods, such as W−Weirs, have been developed to reduce erosion. For this study, we performed two experiments: (1) installing a W−Weir in various positions to determine the best angle for placement, and (2) investigating the variation of flow patterns and bed shear stress distribution in a 90-degree sharp bend by measuring the 3D components of flow velocities, with and without W−Weirs, where the greatest scour depth occurs. The results from the three installation angles indicate that less scour depth and volume of sediment removal occur when the weir is located close to the end of a bend. In addition, the value of the secondary circular power without a weir was higher than the position with a weir; however, this value significantly increased at 70 degrees due to turbulence flow near the W−Weir. This secondary flow power reduction at 45 degrees with a W−Weir increased by 65.8 percent for a Froude number value of 0.17, and by 29.8 percent for a Froude number value of 0.28, compared to values without the W−Weir, respectively.https://www.mdpi.com/2073-4441/15/1/11W−Weir90-degree bendsecondary flowshear stresserosionflow pattern |
| spellingShingle | Vida Atashi Mahmood Shafai Bejestan Yeo Howe Lim Flow Pattern and Erosion in a 90-Degrees Sharp Bend around a W−Weir Water W−Weir 90-degree bend secondary flow shear stress erosion flow pattern |
| title | Flow Pattern and Erosion in a 90-Degrees Sharp Bend around a W−Weir |
| title_full | Flow Pattern and Erosion in a 90-Degrees Sharp Bend around a W−Weir |
| title_fullStr | Flow Pattern and Erosion in a 90-Degrees Sharp Bend around a W−Weir |
| title_full_unstemmed | Flow Pattern and Erosion in a 90-Degrees Sharp Bend around a W−Weir |
| title_short | Flow Pattern and Erosion in a 90-Degrees Sharp Bend around a W−Weir |
| title_sort | flow pattern and erosion in a 90 degrees sharp bend around a w weir |
| topic | W−Weir 90-degree bend secondary flow shear stress erosion flow pattern |
| url | https://www.mdpi.com/2073-4441/15/1/11 |
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