{"title":"Effect of simultaneous use of cable and bed sill scour countermeasures around a cylindrical pier","authors":"Ehsan Gerami, Manouchehr Heidarpour, Reza Mohammadpour Ghalati","doi":"10.1680/jwama.21.00043","DOIUrl":null,"url":null,"abstract":"The simultaneous use of cable and bed sill (CBS) scour countermeasures around a cylindrical pier was investigated. With the aim of finding the best combination of CBS in terms of scour depth reduction, 16 laboratory assessments of local scour were conducted. These experiments were also used to investigate the turbulent flow structure and sediment entrainment. The best combination of simultaneous CBS reduced the scour depth by about 34%. The flow structures around an unprotected pier (reference case) and for the best CBS configuration were compared by employing turbulent analysis methods. Two-dimensional bursting events were used to understand the stochastic nature of the flow structure around the pier. The turbulence characteristics and occurrence probabilities of bursting events confirmed the effect of the combination of CBS on reducing the scour depth. In addition, of all the bursting events, ejection events were found to have the highest transition probabilities.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1680/jwama.21.00043","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The simultaneous use of cable and bed sill (CBS) scour countermeasures around a cylindrical pier was investigated. With the aim of finding the best combination of CBS in terms of scour depth reduction, 16 laboratory assessments of local scour were conducted. These experiments were also used to investigate the turbulent flow structure and sediment entrainment. The best combination of simultaneous CBS reduced the scour depth by about 34%. The flow structures around an unprotected pier (reference case) and for the best CBS configuration were compared by employing turbulent analysis methods. Two-dimensional bursting events were used to understand the stochastic nature of the flow structure around the pier. The turbulence characteristics and occurrence probabilities of bursting events confirmed the effect of the combination of CBS on reducing the scour depth. In addition, of all the bursting events, ejection events were found to have the highest transition probabilities.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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