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Investigating skimming flow conditions over stepped spillways using particle image velocimetry

A A Zuhaira, Jose Horrillo-Caraballo Orcid Logo, Harshinie Karunarathna Orcid Logo, Dominic Reeve Orcid Logo

IOP Conference Series: Materials Science and Engineering, Volume: 888, Start page: 012023

Swansea University Authors: Jose Horrillo-Caraballo Orcid Logo, Harshinie Karunarathna Orcid Logo, Dominic Reeve Orcid Logo

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DOI (Published version): 10.1088/1757-899x/888/1/012023

Abstract

Turbulent flow over stepped spillways can be considered the most significant flow that can cause severe problems at the downstream side, near the toe of the structure, such as sediment erosion which normally occurs due to the high amount of water energy. The presence of turbulent flow over the steps...

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Published in: IOP Conference Series: Materials Science and Engineering
ISSN: 1757-899X
Published: IOP Publishing 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa55255
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spelling 2020-11-09T17:13:23.6129935 v2 55255 2020-09-24 Investigating skimming flow conditions over stepped spillways using particle image velocimetry 5166f9cd40b7c8628375d3f22d1c473c 0000-0001-7694-3812 Jose Horrillo-Caraballo Jose Horrillo-Caraballo true false 0d3d327a240d49b53c78e02b7c00e625 0000-0002-9087-3811 Harshinie Karunarathna Harshinie Karunarathna true false 3e76fcc2bb3cde4ddee2c8edfd2f0082 0000-0003-1293-4743 Dominic Reeve Dominic Reeve true false 2020-09-24 MECH Turbulent flow over stepped spillways can be considered the most significant flow that can cause severe problems at the downstream side, near the toe of the structure, such as sediment erosion which normally occurs due to the high amount of water energy. The presence of turbulent flow over the steps can cause cavitation damages due to pressure differences over the steps. The turbulent flow, which is induced at certain times of the year, especially during the flooding seasons, is examined experimentally and numerically in this study. Flow measurements were conducted using Particle Image Velocimetry (PIV) system in a hydraulic flume where the dam break condition is applied in order to achieve the skimming turbulent flow. Two cases of stepped spillways were tested, normal stepped spillways and gabion stepped spillways. For each case, measurements of the instantaneous turbulent velocity field were taken at different locations of the physical models of a slope of (1V:2H). A comparison has been conducted between the gabion and normal steps to assess the required time to attach skimming flow. The results indicated that the presence of the porous media could increase the required time to attach skimming flow. Journal Article IOP Conference Series: Materials Science and Engineering 888 012023 IOP Publishing 1757-899X 1 8 2020 2020-08-01 10.1088/1757-899x/888/1/012023 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2020-11-09T17:13:23.6129935 2020-09-24T10:47:42.6198984 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering A A Zuhaira 1 Jose Horrillo-Caraballo 0000-0001-7694-3812 2 Harshinie Karunarathna 0000-0002-9087-3811 3 Dominic Reeve 0000-0003-1293-4743 4 55255__18243__4049091a7779488b96ae19f83a4f9cef.pdf 55255.pdf 2020-09-24T10:49:47.6971015 Output 1676876 application/pdf Version of Record true © 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 licence true eng http://creativecommons.org/licenses/by/3.0
title Investigating skimming flow conditions over stepped spillways using particle image velocimetry
spellingShingle Investigating skimming flow conditions over stepped spillways using particle image velocimetry
Jose Horrillo-Caraballo
Harshinie Karunarathna
Dominic Reeve
title_short Investigating skimming flow conditions over stepped spillways using particle image velocimetry
title_full Investigating skimming flow conditions over stepped spillways using particle image velocimetry
title_fullStr Investigating skimming flow conditions over stepped spillways using particle image velocimetry
title_full_unstemmed Investigating skimming flow conditions over stepped spillways using particle image velocimetry
title_sort Investigating skimming flow conditions over stepped spillways using particle image velocimetry
author_id_str_mv 5166f9cd40b7c8628375d3f22d1c473c
0d3d327a240d49b53c78e02b7c00e625
3e76fcc2bb3cde4ddee2c8edfd2f0082
author_id_fullname_str_mv 5166f9cd40b7c8628375d3f22d1c473c_***_Jose Horrillo-Caraballo
0d3d327a240d49b53c78e02b7c00e625_***_Harshinie Karunarathna
3e76fcc2bb3cde4ddee2c8edfd2f0082_***_Dominic Reeve
author Jose Horrillo-Caraballo
Harshinie Karunarathna
Dominic Reeve
author2 A A Zuhaira
Jose Horrillo-Caraballo
Harshinie Karunarathna
Dominic Reeve
format Journal article
container_title IOP Conference Series: Materials Science and Engineering
container_volume 888
container_start_page 012023
publishDate 2020
institution Swansea University
issn 1757-899X
doi_str_mv 10.1088/1757-899x/888/1/012023
publisher IOP Publishing
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str 1
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description Turbulent flow over stepped spillways can be considered the most significant flow that can cause severe problems at the downstream side, near the toe of the structure, such as sediment erosion which normally occurs due to the high amount of water energy. The presence of turbulent flow over the steps can cause cavitation damages due to pressure differences over the steps. The turbulent flow, which is induced at certain times of the year, especially during the flooding seasons, is examined experimentally and numerically in this study. Flow measurements were conducted using Particle Image Velocimetry (PIV) system in a hydraulic flume where the dam break condition is applied in order to achieve the skimming turbulent flow. Two cases of stepped spillways were tested, normal stepped spillways and gabion stepped spillways. For each case, measurements of the instantaneous turbulent velocity field were taken at different locations of the physical models of a slope of (1V:2H). A comparison has been conducted between the gabion and normal steps to assess the required time to attach skimming flow. The results indicated that the presence of the porous media could increase the required time to attach skimming flow.
published_date 2020-08-01T04:09:20Z
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score 11.036815

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