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Abstract

In a previous paper, the authors proposed a transient-based area reconstruction method to identify multiple blockages in pipe systems without prior knowledge of their geometry and number, resulting in very accurate numerical results. In this paper, the accuracy and robustness of the method is verified in a real laboratory system in which the experimental setup considers mild (35% reduction in area) and severe (85% reduction in area) blockage cases. It is found that both blockage cases can be successfully identified; however, there are some differences between the actual and estimated pipe areas. These differences are shown to be mainly due to the limited frequency bandwidth (FBW) of the generated transient wave, causing three major errors: (1) distortion of the image of the step changes in area, (2) uneven distortion of the image of the two sharp changes of the area, and (3) underestimation of the blockage severity. These limitations and errors are discussed in detail in the paper.

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Data Availability Statement

Some or all data, models, or code generated or used during the study are available from the corresponding author by request.

Acknowledgments

This research is funded by the postgraduate studentship and by the Research Grant Council of the Hong Kong SAR, China [Project No. T21-602/15R, title: Smart Urban Water Supply Systems (Smart UWSS)].

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Go to Journal of Hydraulic Engineering
Journal of Hydraulic Engineering
Volume 146Issue 3March 2020

History

Received: Aug 3, 2018
Accepted: Jun 12, 2019
Published online: Jan 9, 2020
Published in print: Mar 1, 2020
Discussion open until: Jun 9, 2020

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Fedi Zouari, Ph.D. [email protected]
Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Hong Kong Univ. of Science and Technology, Hong Kong (corresponding author). Email: [email protected]
Moez Louati [email protected]
Research Assistant Professor, Dept. of Civil and Environmental Engineering, Hong Kong Univ. of Science and Technology, Hong Kong. Email: [email protected]
Silvia Meniconi [email protected]
Associate Professor, Dept. of Civil and Environmental Engineering, Università degli Studi di Perugia, 06125 Perugia, Italy. Email: [email protected]
Postdoctoral Fellow, Jockey Club Institute for Advanced Study, Hong Kong Univ. of Science and Technology, Hong Kong. ORCID: https://orcid.org/0000-0001-6675-6108. Email: [email protected]
Mohamed S. Ghidaoui, M.ASCE [email protected]
Chair Professor and Chinese Estates Professor of Engineering, Dept. of Civil and Environmental Engineering, Hong Kong Univ. of Science and Technology, Hong Kong. Email: [email protected]
Professor, Dept. of Civil and Environmental Engineering, Università degli Studi di Perugia, 06125 Perugia, Italy. ORCID: https://orcid.org/0000-0002-7106-2116. Email: [email protected]

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