Development of Three-Dimensional Scour below Pipelines in Regular Waves
The three-dimensional scour beneath a partially-buried pipeline in regular waves was visualized using a miniature camera installed in a transparent pipeline. The scour mechanism was analyzed based on the results. Scour development was observed to start at the upstream edge of the span shoulder when...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/2/124 |
| _version_ | 1797479074931671040 |
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| author | Yehui Zhu Liquan Xie Tsunming Wong Tsung-Chow Su |
| author_facet | Yehui Zhu Liquan Xie Tsunming Wong Tsung-Chow Su |
| author_sort | Yehui Zhu |
| collection | DOAJ |
| description | The three-dimensional scour beneath a partially-buried pipeline in regular waves was visualized using a miniature camera installed in a transparent pipeline. The scour mechanism was analyzed based on the results. Scour development was observed to start at the upstream edge of the span shoulder when the flow in the span headed downstream. The nearby sediment scoured quickly, and a new scour front formed, which can be attributed to the deflected flow entering the scour hole. The new scour front retreated gradually. The end of the original scour front deformed and moved downstream, probably due to the enhanced seepage flow near the edge of the span shoulder. After that, the new scour front extended to the downstream interface of the sediment and the pipeline, and continued to retreat until the first half of the scour process ended. In the second half of the scour process, the sediment transportation occurred in a similar but mirror-imaged manner. The scour hole propagation rate was also determined based on visualization. The results show that the scour hole propagation rate under a pipeline decreases with an increasing pipeline embedment ratio and rises with the <i>KC</i> (Keulegan–Carpenter) number, which is similar to the result of a previous study. |
| first_indexed | 2024-03-09T21:40:38Z |
| format | Article |
| id | doaj.art-d6812e8fe76e4b59b2b547f5bcc956a7 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T21:40:38Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-d6812e8fe76e4b59b2b547f5bcc956a72023-11-23T20:33:57ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-01-0110212410.3390/jmse10020124Development of Three-Dimensional Scour below Pipelines in Regular WavesYehui Zhu0Liquan Xie1Tsunming Wong2Tsung-Chow Su3School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaSchool of Civil Engineering, Tsinghua University, Beijing 100084, ChinaDepartment of Ocean and Mechanical Engineering, Florida Atlantic University, Boca Raton, FL 33431, USAThe three-dimensional scour beneath a partially-buried pipeline in regular waves was visualized using a miniature camera installed in a transparent pipeline. The scour mechanism was analyzed based on the results. Scour development was observed to start at the upstream edge of the span shoulder when the flow in the span headed downstream. The nearby sediment scoured quickly, and a new scour front formed, which can be attributed to the deflected flow entering the scour hole. The new scour front retreated gradually. The end of the original scour front deformed and moved downstream, probably due to the enhanced seepage flow near the edge of the span shoulder. After that, the new scour front extended to the downstream interface of the sediment and the pipeline, and continued to retreat until the first half of the scour process ended. In the second half of the scour process, the sediment transportation occurred in a similar but mirror-imaged manner. The scour hole propagation rate was also determined based on visualization. The results show that the scour hole propagation rate under a pipeline decreases with an increasing pipeline embedment ratio and rises with the <i>KC</i> (Keulegan–Carpenter) number, which is similar to the result of a previous study.https://www.mdpi.com/2077-1312/10/2/124pipeline scourthree-dimensional scourscour propagation rateregular wavesKeulegan–Carpenter number (<i>KC</i> number) |
| spellingShingle | Yehui Zhu Liquan Xie Tsunming Wong Tsung-Chow Su Development of Three-Dimensional Scour below Pipelines in Regular Waves Journal of Marine Science and Engineering pipeline scour three-dimensional scour scour propagation rate regular waves Keulegan–Carpenter number (<i>KC</i> number) |
| title | Development of Three-Dimensional Scour below Pipelines in Regular Waves |
| title_full | Development of Three-Dimensional Scour below Pipelines in Regular Waves |
| title_fullStr | Development of Three-Dimensional Scour below Pipelines in Regular Waves |
| title_full_unstemmed | Development of Three-Dimensional Scour below Pipelines in Regular Waves |
| title_short | Development of Three-Dimensional Scour below Pipelines in Regular Waves |
| title_sort | development of three dimensional scour below pipelines in regular waves |
| topic | pipeline scour three-dimensional scour scour propagation rate regular waves Keulegan–Carpenter number (<i>KC</i> number) |
| url | https://www.mdpi.com/2077-1312/10/2/124 |
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