Characterisation of low-Reynolds number flow through an orifice: CFD results vs. laboratory data

Nuno M. C. Martins; Didia I. C. Covas; Silvia MeniconiCaterina CapponiBruno Brunone

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Characterisation of low-Reynolds number flow through an orifice: CFD results vs. laboratory data

机译：Characterisation of low-Reynolds number flow through an orifice: CFD results vs. laboratory data

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Pressurised pipe systems transport fluids daily over long distances and sediment deposits areresponsible for narrowing the cross-sectional area of the pipe. This reduces the carrying capacity ingravity pipes and increases the energy consumption in rising mains. As partial blockages do not giverise to any external evidence, they are considered the most insidious fault occurring in pipe systems.Thus, the refinement of reliable techniques for detecting partial blockages at an early stage is of greatinterest to water utilities. This paper presents a computational fluid dynamics (CFD)-based analysis ofthe steady-state flow through a sharp-edged orifice which corresponds to the most straightforwardpartial blockage feature in a pipe. The main motivation is the fact that the interaction betweenpressure waves and a partial blockage – on which Transient Test-Based Techniques for faultdetection are based – is strongly influenced by the pre-transient conditions at the partial blockage.The refined CFD model has been validated by considering experimental data selected from theliterature. The comparison of obtained results demonstrates good performance of the numericalmodel. This authorised exploring in detail the features of the flow through the orifice as a necessarypremise to its use within the successive transient analysis.

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来源
《Journal of hydroinformatics》 |2021年第4期|709-723|共15页
作者
Nuno M. C. Martins; Didia I. C. Covas; Silvia MeniconiCaterina CapponiBruno Brunone;
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作者单位

CERIS, Instituto Superior Tecnico,Universidade de Lisboa,Lisboa,Portugal;

Department of Civil and EnvironmentalEngineering,The University of Perugia,Perugia,ItalyThis is an Open Access article distributed under the terms of the Creative;

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收录信息美国《科学引文索引》(SCI);
原文格式 PDF
正文语种英语
中图分类水文科学（水界物理学）;
关键词
CFD; low-Reynolds number flow; partial blockage; pipes; sharp-edge orifice;

Characterisation of low-Reynolds number flow through an orifice: CFD results vs. laboratory data

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