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The flow rate of water, and the accuracy used to measure it, is important to know. Numerous international and national standards exist, defining the conditions for flow measurement. However, the needed “standardized flow conditions” are often impossible to satisfy in field and they can be used just as guidance. This paper presents four cases with such non-standard conditions, where the author had to perform the flow rate measurement. For each case the approach used is explained, the results obtained are given and the achieved accuracy is assessed. All measurements were performed using electromagnetic (EM) velocity measurement probes, specifically designed to suit local conditions. Parallel to direct velocity measurement, CFD (Computational Fluid Dynamics) was used to analyse the flow conditions and get better insight into the flow field, with an idea to extract the data from modelled flow field in order to perform the flow meter calibration. Throughout the presented cases, which cover last two decades, clear developments of both hardware and knowledge can be seen. Proceedings of the International Conference celebrating 175th Anniversary of the Faculty of Civil Engineering, University of Belgrade; Editors: Vladan Kuzmanović and Ivan Ignjatović; Book of proceedings available at: https://www.grf.bg.ac.rs/p/docs/ostalo/zbornik_gra_evinarstvo_2021_1635763208136.pdf |
