Cross-waves and pulsating flows in the side-channel spillway – an experimental approach
Potentially hazardous side-channels of complex geometry need to be investigated using detailed hydraulic physical models. This study aims to analyse the cross-waves pattern and pulsating flow using a side-channel spillway physical model. This study compares the cross-waves pattern were measured usin...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2023-02-01
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| Series: | Journal of Water and Land Development |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/126036/PDF/2023-01-JWLD-08.pdf |
| _version_ | 1797804204483411968 |
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| author | Azmeri Azmeri Chairatun Ummah Faris Zahran Jemi Imam Faudli Qurratul 'Aini Benti Nasaiy |
| author_facet | Azmeri Azmeri Chairatun Ummah Faris Zahran Jemi Imam Faudli Qurratul 'Aini Benti Nasaiy |
| author_sort | Azmeri Azmeri |
| collection | DOAJ |
| description | Potentially hazardous side-channels of complex geometry need to be investigated using detailed hydraulic physical models. This study aims to analyse the cross-waves pattern and pulsating flow using a side-channel spillway physical model. This study compares the cross-waves pattern were measured using an experimental installation set to generate cross-waves on the surface (original series) with another structure that did not produce cross-waves (modified series). The results showed that the geometry of the left wall caused instability in flow patterns and secondary flows. The starting point of Q 2 discharge was detected by minor turbulence on the water surface near the left wall at a water depth of 3.3 m at the starting point of the wall, but with no overtopping. Cross-waves formed downstream at the right wall crosswise, lower than at the left wall. The height of the cross-wave increased substantially from Q 100 to Q 1000 discharges leading to overtoppings near the left wall at a water depths of 4.2 and 5.0 m at the starting point of the wall, and near the right wall at a water depths of 3.8 and 4.0 m at the upstream point of the wall. The modifications provided optimal hydraulic conditions, i.e. elimination of cross-waves and non-uniform flows. The Vedernikov and Montouri numbers showed that both original and modified series did not enter the area where the pulsating flow occurred. This indicated that both series were free from the pulsating flow. |
| first_indexed | 2024-03-13T05:32:41Z |
| format | Article |
| id | doaj.art-8504efe087004274864e8413fb439fdc |
| institution | Directory Open Access Journal |
| issn | 2083-4535 |
| language | English |
| last_indexed | 2024-03-13T05:32:41Z |
| publishDate | 2023-02-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Journal of Water and Land Development |
| spelling | doaj.art-8504efe087004274864e8413fb439fdc2023-06-14T15:13:41ZengPolish Academy of SciencesJournal of Water and Land Development2083-45352023-02-01No 565157https://doi.org/10.24425/jwld.2023.143744Cross-waves and pulsating flows in the side-channel spillway – an experimental approachAzmeri Azmeri0https://orcid.org/0000-0002-3552-036XChairatun Ummah1https://orcid.org/0000-0001-5589-7204Faris Zahran Jemi2https://orcid.org/0000-0002-5572-7288Imam Faudli3https://orcid.org/0000-0002-4944-3449Qurratul 'Aini Benti Nasaiy4Universitas Syiah Kuala, Engineering Faculty, Civil Engineering Department, Jl. Tgk. Syech Abdur-Rauf No. 7, Darussalam, 23111, Banda Aceh, IndonesiaUniversitas Syiah Kuala, Engineering Faculty, Civil Engineering Department, Jl. Tgk. Syech Abdur-Rauf No. 7, Darussalam, 23111, Banda Aceh, IndonesiaUniversitas Syiah Kuala, Engineering Faculty, Electrical Engineering Department, Darussalam, Banda Aceh, IndonesiaUniversitas Syiah Kuala, Engineering Faculty, Civil Engineering Department, Jl. Tgk. Syech Abdur-Rauf No. 7, Darussalam, 23111, Banda Aceh, IndonesiaUniversitas Syiah Kuala, Engineering Faculty, Civil Engineering Department, Jl. Tgk. Syech Abdur-Rauf No. 7, Darussalam, 23111, Banda Aceh, IndonesiaPotentially hazardous side-channels of complex geometry need to be investigated using detailed hydraulic physical models. This study aims to analyse the cross-waves pattern and pulsating flow using a side-channel spillway physical model. This study compares the cross-waves pattern were measured using an experimental installation set to generate cross-waves on the surface (original series) with another structure that did not produce cross-waves (modified series). The results showed that the geometry of the left wall caused instability in flow patterns and secondary flows. The starting point of Q 2 discharge was detected by minor turbulence on the water surface near the left wall at a water depth of 3.3 m at the starting point of the wall, but with no overtopping. Cross-waves formed downstream at the right wall crosswise, lower than at the left wall. The height of the cross-wave increased substantially from Q 100 to Q 1000 discharges leading to overtoppings near the left wall at a water depths of 4.2 and 5.0 m at the starting point of the wall, and near the right wall at a water depths of 3.8 and 4.0 m at the upstream point of the wall. The modifications provided optimal hydraulic conditions, i.e. elimination of cross-waves and non-uniform flows. The Vedernikov and Montouri numbers showed that both original and modified series did not enter the area where the pulsating flow occurred. This indicated that both series were free from the pulsating flow.https://journals.pan.pl/Content/126036/PDF/2023-01-JWLD-08.pdfcross-waveshydrodynamic forcephysical modelpulsating flowside-channel spillway |
| spellingShingle | Azmeri Azmeri Chairatun Ummah Faris Zahran Jemi Imam Faudli Qurratul 'Aini Benti Nasaiy Cross-waves and pulsating flows in the side-channel spillway – an experimental approach Journal of Water and Land Development cross-waves hydrodynamic force physical model pulsating flow side-channel spillway |
| title | Cross-waves and pulsating flows in the side-channel spillway – an experimental approach |
| title_full | Cross-waves and pulsating flows in the side-channel spillway – an experimental approach |
| title_fullStr | Cross-waves and pulsating flows in the side-channel spillway – an experimental approach |
| title_full_unstemmed | Cross-waves and pulsating flows in the side-channel spillway – an experimental approach |
| title_short | Cross-waves and pulsating flows in the side-channel spillway – an experimental approach |
| title_sort | cross waves and pulsating flows in the side channel spillway an experimental approach |
| topic | cross-waves hydrodynamic force physical model pulsating flow side-channel spillway |
| url | https://journals.pan.pl/Content/126036/PDF/2023-01-JWLD-08.pdf |
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