泥沙密度对河道弯曲河床地形影响的数值模拟

Q4 Engineering

The Journal of Engineering Research Pub Date : 2016-06-01 DOI:10.24200/TJER.VOL13ISS1PP22-32

M. Vaghefi, Yaser Safarpoor, S. Hashemi

{"title":"泥沙密度对河道弯曲河床地形影响的数值模拟","authors":"M. Vaghefi, Yaser Safarpoor, S. Hashemi","doi":"10.24200/TJER.VOL13ISS1PP22-32","DOIUrl":null,"url":null,"abstract":"In this paper, the bed topography of a channel at a 90-degree bend was studied at the T-shaped spur dike installed at the middle of the outer bank. Numerical analyses were performed with the Sediment Simulation in Intakes with Multiblock Option (SSIIM) model. Three relative curvatures (R/B = 2, 3, and 4) related to the three sediment densities (P = 2.35, 2.5, and 2.65) were modeled in nine cases and the effects of sediment density on the bed scour patterns were studied. It was observed that the maximum amount of scour occurred near the head of the dike wing at the dike’s upstream, and the maximum amount of sedimentation occurred at the inner bank of the bend exit. By increasing the sediment density when R/B = 4, the maximum scour and sedimentation decreased to 27.41% and 46.15%, respectively. When R/B = 3, the maximum scour and sedimentation decreased to 25.93% and 23.91%, respectively. When R/B = 2, the maximum scour and sedimentation decreased to 25.98% and 10%, respectively.","PeriodicalId":31979,"journal":{"name":"The Journal of Engineering Research","volume":"1 1","pages":"22-32"},"PeriodicalIF":0.0000,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Effect of Sediment Density on the Bed Topography in a Channel Bend Using Numerical Modeling\",\"authors\":\"M. Vaghefi, Yaser Safarpoor, S. Hashemi\",\"doi\":\"10.24200/TJER.VOL13ISS1PP22-32\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this paper, the bed topography of a channel at a 90-degree bend was studied at the T-shaped spur dike installed at the middle of the outer bank. Numerical analyses were performed with the Sediment Simulation in Intakes with Multiblock Option (SSIIM) model. Three relative curvatures (R/B = 2, 3, and 4) related to the three sediment densities (P = 2.35, 2.5, and 2.65) were modeled in nine cases and the effects of sediment density on the bed scour patterns were studied. It was observed that the maximum amount of scour occurred near the head of the dike wing at the dike’s upstream, and the maximum amount of sedimentation occurred at the inner bank of the bend exit. By increasing the sediment density when R/B = 4, the maximum scour and sedimentation decreased to 27.41% and 46.15%, respectively. When R/B = 3, the maximum scour and sedimentation decreased to 25.93% and 23.91%, respectively. When R/B = 2, the maximum scour and sedimentation decreased to 25.98% and 10%, respectively.\",\"PeriodicalId\":31979,\"journal\":{\"name\":\"The Journal of Engineering Research\",\"volume\":\"1 1\",\"pages\":\"22-32\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2016-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"The Journal of Engineering Research\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.24200/TJER.VOL13ISS1PP22-32\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Journal of Engineering Research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.24200/TJER.VOL13ISS1PP22-32","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Engineering","Score":null,"Total":0}

引用次数: 1

摘要

本文以外岸中部的t型直堤为研究对象，研究了90度弯道的河床地形。采用多块选项(SSIIM)模型对进水口泥沙进行了数值模拟。在9个案例中，分别模拟了3种泥沙密度(P = 2.35、2.5和2.65)对应的3种相对曲率(R/B = 2、3和4)，并研究了泥沙密度对河床冲刷模式的影响。结果表明，在堤防上游，最大冲刷发生在堤防翼头附近，最大淤积发生在弯道出口的内岸。当R/B = 4时，增大底泥密度，最大冲刷量和最大沉积量分别降至27.41%和46.15%。当R/B = 3时，最大冲刷量和最大沉积量分别降至25.93%和23.91%。当R/B = 2时，最大冲刷率降至25.98%，最大沉积率降至10%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Effect of Sediment Density on the Bed Topography in a Channel Bend Using Numerical Modeling

In this paper, the bed topography of a channel at a 90-degree bend was studied at the T-shaped spur dike installed at the middle of the outer bank. Numerical analyses were performed with the Sediment Simulation in Intakes with Multiblock Option (SSIIM) model. Three relative curvatures (R/B = 2, 3, and 4) related to the three sediment densities (P = 2.35, 2.5, and 2.65) were modeled in nine cases and the effects of sediment density on the bed scour patterns were studied. It was observed that the maximum amount of scour occurred near the head of the dike wing at the dike’s upstream, and the maximum amount of sedimentation occurred at the inner bank of the bend exit. By increasing the sediment density when R/B = 4, the maximum scour and sedimentation decreased to 27.41% and 46.15%, respectively. When R/B = 3, the maximum scour and sedimentation decreased to 25.93% and 23.91%, respectively. When R/B = 2, the maximum scour and sedimentation decreased to 25.98% and 10%, respectively.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

The Journal of Engineering Research Engineering-Engineering (all)

CiteScore

0.70

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： The Journal of Engineering Research (TJER) is envisaged as a refereed international publication of Sultan Qaboos University, Sultanate of Oman. The Journal is to provide a medium through which Engineering Researchers and Scholars from around the world would be able to publish their scholarly applied and/or fundamental research works.