Measurements of fluctuation in drag acting on rigid cylinder array in open channel flow
In this study, an array of rigid cylindrical rods was used to simulate emergent vegetation stems that were subject to unidirectional open channel flows. The instantaneous drag force experienced by the rods was measured with a load cell. In addition, the particle image velocimetry (PIV) technique was...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/101992 http://hdl.handle.net/10220/19725 |
| _version_ | 1826127457584939008 |
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| author | Zhao, Kuifeng Cheng, Nian-Sheng Wang, Xikun Tan, Soon Keat |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Zhao, Kuifeng Cheng, Nian-Sheng Wang, Xikun Tan, Soon Keat |
| author_sort | Zhao, Kuifeng |
| collection | NTU |
| description | In this study, an array of rigid cylindrical rods was used to simulate emergent vegetation stems that were subject to unidirectional open channel flows. The instantaneous drag force experienced by the rods was measured with a load cell. In addition, the particle image velocimetry (PIV) technique was applied to sample the flow information in a horizontal plane, and wave gauges were used to record the fluctuation in the water-surface elevation. The results show that the drag fluctuation normalized by the mean value may reach as high as 133% when the Reynolds number (defined based on the stem diameter) varied in the range from 400 to 1,100. High fluctuations were also observed in the flow velocity and flow depth under similar flow conditions. |
| first_indexed | 2024-10-01T07:09:12Z |
| format | Journal Article |
| id | ntu-10356/101992 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:09:12Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1019922020-03-07T11:45:54Z Measurements of fluctuation in drag acting on rigid cylinder array in open channel flow Zhao, Kuifeng Cheng, Nian-Sheng Wang, Xikun Tan, Soon Keat School of Civil and Environmental Engineering Maritime Research Centre DRNTU::Engineering::Civil engineering::Water resources In this study, an array of rigid cylindrical rods was used to simulate emergent vegetation stems that were subject to unidirectional open channel flows. The instantaneous drag force experienced by the rods was measured with a load cell. In addition, the particle image velocimetry (PIV) technique was applied to sample the flow information in a horizontal plane, and wave gauges were used to record the fluctuation in the water-surface elevation. The results show that the drag fluctuation normalized by the mean value may reach as high as 133% when the Reynolds number (defined based on the stem diameter) varied in the range from 400 to 1,100. High fluctuations were also observed in the flow velocity and flow depth under similar flow conditions. Accepted version 2014-06-13T01:40:38Z 2019-12-06T20:48:06Z 2014-06-13T01:40:38Z 2019-12-06T20:48:06Z 2014 2014 Journal Article Zhao, K., Cheng, N.-S., Wang, X., & Tan, S. K. (2014). Measurements of Fluctuation in Drag Acting on Rigid Cylinder Array in Open Channel Flow. Journal of Hydraulic Engineering, 140(1), 48-55. 0733-9429 https://hdl.handle.net/10356/101992 http://hdl.handle.net/10220/19725 10.1061/(ASCE)HY.1943-7900.0000811 en Journal of hydraulic engineering © 2014 American Society of Civil Engineers. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Hydraulic Engineering, American Society of Civil Engineers. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1061/10.1061/(ASCE)HY.1943-7900.0000811] 22 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Civil engineering::Water resources Zhao, Kuifeng Cheng, Nian-Sheng Wang, Xikun Tan, Soon Keat Measurements of fluctuation in drag acting on rigid cylinder array in open channel flow |
| title | Measurements of fluctuation in drag acting on rigid cylinder array in open channel flow |
| title_full | Measurements of fluctuation in drag acting on rigid cylinder array in open channel flow |
| title_fullStr | Measurements of fluctuation in drag acting on rigid cylinder array in open channel flow |
| title_full_unstemmed | Measurements of fluctuation in drag acting on rigid cylinder array in open channel flow |
| title_short | Measurements of fluctuation in drag acting on rigid cylinder array in open channel flow |
| title_sort | measurements of fluctuation in drag acting on rigid cylinder array in open channel flow |
| topic | DRNTU::Engineering::Civil engineering::Water resources |
| url | https://hdl.handle.net/10356/101992 http://hdl.handle.net/10220/19725 |
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