Numerical simulation of flow over short crested weirs - case study: Quarter-circular crested weir

IF 2.3 3区工程技术 Q2 ENGINEERING, MECHANICAL

Flow Measurement and Instrumentation Pub Date : 2024-05-16 DOI:10.1016/j.flowmeasinst.2024.102615

Abbas Parsaie , damoon mohamad ali nezhadian , Jahanshir Mohammadzadeh-Habili

{"title":"Numerical simulation of flow over short crested weirs - case study: Quarter-circular crested weir","authors":"Abbas Parsaie , damoon mohamad ali nezhadian , Jahanshir Mohammadzadeh-Habili","doi":"10.1016/j.flowmeasinst.2024.102615","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, the flow characteristics over a quarter-circular crested spillway (QCCS) were investigated using computational fluid dynamics (CFD) simulations. The simulations included an in-depth analysis of parameters such as flow velocity, pressure distribution, and streamline patterns. The RNG turbulence model was used to simulate the flow field and hydraulic characteristics. In particular, the simulations were performed at the design discharge. The numerical results were carefully compared with laboratory observations, showing that there is good agreement between the simulated results and the observed data. The results of the numerical simulation showed that the streamlines are completely in line with the curvature of the crest and that there is no separation zone (separation of the streamlines from the surface of the crest). furthermore, there is no negative pressure zone along the crest, which means that the risk of cavitation is eliminated. The highest value of velocity and the lowest pressure of flow occur at the outlet end of the crest.</p></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"97 ","pages":"Article 102615"},"PeriodicalIF":2.3000,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Flow Measurement and Instrumentation","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0955598624000955","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, the flow characteristics over a quarter-circular crested spillway (QCCS) were investigated using computational fluid dynamics (CFD) simulations. The simulations included an in-depth analysis of parameters such as flow velocity, pressure distribution, and streamline patterns. The RNG turbulence model was used to simulate the flow field and hydraulic characteristics. In particular, the simulations were performed at the design discharge. The numerical results were carefully compared with laboratory observations, showing that there is good agreement between the simulated results and the observed data. The results of the numerical simulation showed that the streamlines are completely in line with the curvature of the crest and that there is no separation zone (separation of the streamlines from the surface of the crest). furthermore, there is no negative pressure zone along the crest, which means that the risk of cavitation is eliminated. The highest value of velocity and the lowest pressure of flow occur at the outlet end of the crest.

查看原文本刊更多论文

短顶堰水流的数值模拟 - 案例研究：四分之一圆顶堰

本研究利用计算流体动力学（CFD）模拟对四分之一圆顶溢洪道（QCCS）上的水流特性进行了研究。模拟包括对流速、压力分布和流线模式等参数的深入分析。RNG 湍流模型用于模拟流场和水力特性。特别是，模拟是在设计排水量下进行的。将数值结果与实验室观测结果进行了仔细比较，结果表明模拟结果与观测数据之间具有良好的一致性。数值模拟的结果表明，流线与波峰的曲率完全一致，没有分离区（流线与波峰表面分离）。此外，波峰沿线没有负压区，这意味着消除了气蚀风险。波峰出口端流速最高，压力最低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Flow Measurement and Instrumentation 工程技术-工程：机械

CiteScore

4.30

自引率

13.60%

发文量

123

审稿时长

6 months

期刊介绍： Flow Measurement and Instrumentation is dedicated to disseminating the latest research results on all aspects of flow measurement, in both closed conduits and open channels. The design of flow measurement systems involves a wide variety of multidisciplinary activities including modelling the flow sensor, the fluid flow and the sensor/fluid interactions through the use of computation techniques; the development of advanced transducer systems and their associated signal processing and the laboratory and field assessment of the overall system under ideal and disturbed conditions. FMI is the essential forum for critical information exchange, and contributions are particularly encouraged in the following areas of interest: Modelling: the application of mathematical and computational modelling to the interaction of fluid dynamics with flowmeters, including flowmeter behaviour, improved flowmeter design and installation problems. Application of CAD/CAE techniques to flowmeter modelling are eligible. Design and development: the detailed design of the flowmeter head and/or signal processing aspects of novel flowmeters. Emphasis is given to papers identifying new sensor configurations, multisensor flow measurement systems, non-intrusive flow metering techniques and the application of microelectronic techniques in smart or intelligent systems. Calibration techniques: including descriptions of new or existing calibration facilities and techniques, calibration data from different flowmeter types, and calibration intercomparison data from different laboratories. Installation effect data: dealing with the effects of non-ideal flow conditions on flowmeters. Papers combining a theoretical understanding of flowmeter behaviour with experimental work are particularly welcome.