Influence of Scour Development on Turbulent Flow Field in Front of a Bridge Pier
This study concerns the turbulent flow field influenced by the scour development around a bridge pier. The scour hole evolution as well as the temporal variation of scour depth around the pier were firstly analyzed. Subsequently, the flow fields in front of the pier at different instants during the...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-08-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/12/9/2370 |
| _version_ | 1797555993980174336 |
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| author | Jinzhao Li Yilin Yang Zhiwen Yang |
| author_facet | Jinzhao Li Yilin Yang Zhiwen Yang |
| author_sort | Jinzhao Li |
| collection | DOAJ |
| description | This study concerns the turbulent flow field influenced by the scour development around a bridge pier. The scour hole evolution as well as the temporal variation of scour depth around the pier were firstly analyzed. Subsequently, the flow fields in front of the pier at different instants during the scour process were measured using particle image velocimetry (PIV). It shows that the scour depth at the pier front exceeds that of the pier side at the later scouring stage. The temporal development of scour depth can be well predicted by a simple practical engineering model based on an exponential function with a change in the two adjustable coefficients. The flow field indicates that with the development of scour hole, the downward flow in front of the pier becomes more prominent, meanwhile the flow becomes more turbulent. The variation tendency for both velocities and turbulence intensities along the streamwise direction in front the pier shows similarity. The Reynolds shear stress generally increases with developing scour hole, and the region with large value enlarges and moves upstream of the scour hole. |
| first_indexed | 2024-03-10T16:55:27Z |
| format | Article |
| id | doaj.art-ee9d235d7ead47798c5ebe968ef164c4 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T16:55:27Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-ee9d235d7ead47798c5ebe968ef164c42023-11-20T11:10:25ZengMDPI AGWater2073-44412020-08-01129237010.3390/w12092370Influence of Scour Development on Turbulent Flow Field in Front of a Bridge PierJinzhao Li0Yilin Yang1Zhiwen Yang2College of Transportation, Shandong University of Science and Technology, Qingdao 266590, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing 100044, ChinaNational Engineering Laboratory of Port Hydraulic Construction Technology, Tianjin Research Institute of Water Transport Engineering, Tianjin 300456, ChinaThis study concerns the turbulent flow field influenced by the scour development around a bridge pier. The scour hole evolution as well as the temporal variation of scour depth around the pier were firstly analyzed. Subsequently, the flow fields in front of the pier at different instants during the scour process were measured using particle image velocimetry (PIV). It shows that the scour depth at the pier front exceeds that of the pier side at the later scouring stage. The temporal development of scour depth can be well predicted by a simple practical engineering model based on an exponential function with a change in the two adjustable coefficients. The flow field indicates that with the development of scour hole, the downward flow in front of the pier becomes more prominent, meanwhile the flow becomes more turbulent. The variation tendency for both velocities and turbulence intensities along the streamwise direction in front the pier shows similarity. The Reynolds shear stress generally increases with developing scour hole, and the region with large value enlarges and moves upstream of the scour hole.https://www.mdpi.com/2073-4441/12/9/2370scour developmentbridge pierflow fieldturbulenceparticle image velocimetry (PIV) |
| spellingShingle | Jinzhao Li Yilin Yang Zhiwen Yang Influence of Scour Development on Turbulent Flow Field in Front of a Bridge Pier Water scour development bridge pier flow field turbulence particle image velocimetry (PIV) |
| title | Influence of Scour Development on Turbulent Flow Field in Front of a Bridge Pier |
| title_full | Influence of Scour Development on Turbulent Flow Field in Front of a Bridge Pier |
| title_fullStr | Influence of Scour Development on Turbulent Flow Field in Front of a Bridge Pier |
| title_full_unstemmed | Influence of Scour Development on Turbulent Flow Field in Front of a Bridge Pier |
| title_short | Influence of Scour Development on Turbulent Flow Field in Front of a Bridge Pier |
| title_sort | influence of scour development on turbulent flow field in front of a bridge pier |
| topic | scour development bridge pier flow field turbulence particle image velocimetry (PIV) |
| url | https://www.mdpi.com/2073-4441/12/9/2370 |
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