{"title":"Internal flow effect on vortex-induced vibration of three-dimensional mining lifting risers with improved wake oscillator model","authors":"Zhiquan Zhou , Wentao Yue , Jiasong Wang","doi":"10.1016/j.oceaneng.2025.121197","DOIUrl":null,"url":null,"abstract":"<div><div>This paper presents an improved three-dimensional nonlinear model considering the axial derivative of varying tension (ADVT) and the dynamically updated relative velocity (DURV) to study the vortex-induced vibration (VIV) of mining lifting risers conveying uniform and slug flow. The model, consisting of structural dynamics and wake oscillator equations, is solved by central difference method. This model offers an enhanced precision of VIV prediction by comparing with the existing experimental and other numerical models. The results reveal that the internal flow effect (IFE) is more significant in the in-line direction. Increase of the internal flow parameters will trigger new cycle of the vibration frequency and alter displacement and dominant mode order of the structure. Besides, the ADVT can change the dominant mode order and vibration frequency, impacting the reliability of displacement. It also reverses the asymmetrical distribution of displacement. The DURV reduces the vibration frequency, improves the VIV prediction sensitivity of internal flow conditions and changes the VIV pattern in both directions. These two factors exhibit similar effects in uniform and slug flow and have more pronounced effect on the latter. The effect is more obvious when these two factors couple or the value of the internal parameters are larger.</div></div>","PeriodicalId":19403,"journal":{"name":"Ocean Engineering","volume":"330 ","pages":"Article 121197"},"PeriodicalIF":5.5000,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ocean Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0029801825009102","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0
Abstract
This paper presents an improved three-dimensional nonlinear model considering the axial derivative of varying tension (ADVT) and the dynamically updated relative velocity (DURV) to study the vortex-induced vibration (VIV) of mining lifting risers conveying uniform and slug flow. The model, consisting of structural dynamics and wake oscillator equations, is solved by central difference method. This model offers an enhanced precision of VIV prediction by comparing with the existing experimental and other numerical models. The results reveal that the internal flow effect (IFE) is more significant in the in-line direction. Increase of the internal flow parameters will trigger new cycle of the vibration frequency and alter displacement and dominant mode order of the structure. Besides, the ADVT can change the dominant mode order and vibration frequency, impacting the reliability of displacement. It also reverses the asymmetrical distribution of displacement. The DURV reduces the vibration frequency, improves the VIV prediction sensitivity of internal flow conditions and changes the VIV pattern in both directions. These two factors exhibit similar effects in uniform and slug flow and have more pronounced effect on the latter. The effect is more obvious when these two factors couple or the value of the internal parameters are larger.
期刊介绍:
Ocean Engineering provides a medium for the publication of original research and development work in the field of ocean engineering. Ocean Engineering seeks papers in the following topics.