Introducing the T-shaped weir: a new nonlinear weir

In the present study, a new nonlinear weir called the T-shaped weir (TSW), which is a combination of the labyrinth weir (LW) and the piano key weir (PKW), was introduced, and its hydraulic performance was compared with the PKW. Based on the presence of the vertical walls at the inlet key, outlet key...

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Autores principales:	Behzad Noroozi, Jalal Bazargan, Akbar Safarzadeh
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	discharge coefficient labyrinth weir local submergence piano key weir t-shaped weir Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/53746bb63419474a83ad3818cd1a5d9a
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spelling	oai:doaj.org-article:53746bb63419474a83ad3818cd1a5d9a2021-11-23T18:56:47ZIntroducing the T-shaped weir: a new nonlinear weir1606-97491607-079810.2166/ws.2021.144https://doaj.org/article/53746bb63419474a83ad3818cd1a5d9a2021-11-01T00:00:00Zhttp://ws.iwaponline.com/content/21/7/3772https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798In the present study, a new nonlinear weir called the T-shaped weir (TSW), which is a combination of the labyrinth weir (LW) and the piano key weir (PKW), was introduced, and its hydraulic performance was compared with the PKW. Based on the presence of the vertical walls at the inlet key, outlet key, or both keys, the TSW weirs were classified as type A, B, or C weirs, respectively. The flow pattern of different TSW cases was analyzed, and the discharge coefficient curves were provided. Furthermore, to accurately study the hydrodynamics of the tested weirs, 3D numerical simulations were performed using the FLOW-3D software. The results showed that inserting a vertical wall at the upstream of the outlet keys (C-TSW type) has a negligible effect on the hydraulic performance of the PKW. A maximum increase of 16% occurred in the discharge coefficient of the B-TSW in comparison to the PKW, and up to a head to height ratio (Ht/p) of 0.45, the effect of the vertical wall on increasing the performance of the B-TSW was maintained. Based on the experimental and numerical tests, the optimal height ratio of the vertical wall (Pd/P) in B-TSW with highest discharge capacity was determined to be equal to 0.4. HIGHLIGHTS A new nonlinear weir called the T-shaped weir (TSW), which is a combination of the labyrinth weir (LW) and the piano key weir (PKW), is introduced.; To investigate the hydrodynamics of the tested weirs in more detail, 3D numerical models are developed on the CFD-software FLOW-3D.; By testing different vertical wall sizes, the optimal size of the vertical wall is determined for B-TSW weir.;Behzad NorooziJalal BazarganAkbar SafarzadehIWA Publishingarticledischarge coefficientlabyrinth weirlocal submergencepiano key weirt-shaped weirWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 7, Pp 3772-3789 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	discharge coefficient labyrinth weir local submergence piano key weir t-shaped weir Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	discharge coefficient labyrinth weir local submergence piano key weir t-shaped weir Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Behzad Noroozi Jalal Bazargan Akbar Safarzadeh Introducing the T-shaped weir: a new nonlinear weir
description	In the present study, a new nonlinear weir called the T-shaped weir (TSW), which is a combination of the labyrinth weir (LW) and the piano key weir (PKW), was introduced, and its hydraulic performance was compared with the PKW. Based on the presence of the vertical walls at the inlet key, outlet key, or both keys, the TSW weirs were classified as type A, B, or C weirs, respectively. The flow pattern of different TSW cases was analyzed, and the discharge coefficient curves were provided. Furthermore, to accurately study the hydrodynamics of the tested weirs, 3D numerical simulations were performed using the FLOW-3D software. The results showed that inserting a vertical wall at the upstream of the outlet keys (C-TSW type) has a negligible effect on the hydraulic performance of the PKW. A maximum increase of 16% occurred in the discharge coefficient of the B-TSW in comparison to the PKW, and up to a head to height ratio (Ht/p) of 0.45, the effect of the vertical wall on increasing the performance of the B-TSW was maintained. Based on the experimental and numerical tests, the optimal height ratio of the vertical wall (Pd/P) in B-TSW with highest discharge capacity was determined to be equal to 0.4. HIGHLIGHTS A new nonlinear weir called the T-shaped weir (TSW), which is a combination of the labyrinth weir (LW) and the piano key weir (PKW), is introduced.; To investigate the hydrodynamics of the tested weirs in more detail, 3D numerical models are developed on the CFD-software FLOW-3D.; By testing different vertical wall sizes, the optimal size of the vertical wall is determined for B-TSW weir.;
format	article
author	Behzad Noroozi Jalal Bazargan Akbar Safarzadeh
author_facet	Behzad Noroozi Jalal Bazargan Akbar Safarzadeh
author_sort	Behzad Noroozi
title	Introducing the T-shaped weir: a new nonlinear weir
title_short	Introducing the T-shaped weir: a new nonlinear weir
title_full	Introducing the T-shaped weir: a new nonlinear weir
title_fullStr	Introducing the T-shaped weir: a new nonlinear weir
title_full_unstemmed	Introducing the T-shaped weir: a new nonlinear weir
title_sort	introducing the t-shaped weir: a new nonlinear weir
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/53746bb63419474a83ad3818cd1a5d9a
work_keys_str_mv	AT behzadnoroozi introducingthetshapedweiranewnonlinearweir AT jalalbazargan introducingthetshapedweiranewnonlinearweir AT akbarsafarzadeh introducingthetshapedweiranewnonlinearweir
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Introducing the T-shaped weir: a new nonlinear weir

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