Free flow over a partially contracted thin-plate weir with a triangular notch ofangle 20.23° and zero weir height

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F26%3A0198312" target="_blank" >RIV/00216305:26110/26:0198312 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.uh.sav.sk/vc_articles/2025_73_2_Pospisilik_132.pdf" target="_blank" >http://www.uh.sav.sk/vc_articles/2025_73_2_Pospisilik_132.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/johh-2025-0010" target="_blank" >10.2478/johh-2025-0010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Free flow over a partially contracted thin-plate weir with a triangular notch ofangle 20.23° and zero weir height

Popis výsledku v původním jazyce

The paper explores flow characteristics in the case of free flow of clean water over a partially contracted thin-plate weir with a triangular notch of angle 20.23° and with zero weir height above the bottom of the approach channel ofrectangular cross-section at 5 approach channel widths and 7 heads. The description was based on the results from experimental research and numerical simulations. The numerical simulations allowed the description of the characteristics in parts of the flow where measurements were difficult to perform. The experimental research quantifies the validity of the numerical simulations and establish recommendations for construction of numerical models. The boundary between a partially contracted weir and a fully contracted weir was established by dimensionless approach channel width of the value 0.32, the flow characteristics (water surface, velocity) in the full range of the partially contracted weir (dimensionless approach channel width in range 0.32 ≤ BU* ≤ 1.00), and recommendations for the placement of a cross-section to measure water surface level for determine the heads (dimensionless distance −4 ≤ x* ≤ −2) were verified.

Název v anglickém jazyce

Free flow over a partially contracted thin-plate weir with a triangular notch ofangle 20.23° and zero weir height

Popis výsledku anglicky

The paper explores flow characteristics in the case of free flow of clean water over a partially contracted thin-plate weir with a triangular notch of angle 20.23° and with zero weir height above the bottom of the approach channel ofrectangular cross-section at 5 approach channel widths and 7 heads. The description was based on the results from experimental research and numerical simulations. The numerical simulations allowed the description of the characteristics in parts of the flow where measurements were difficult to perform. The experimental research quantifies the validity of the numerical simulations and establish recommendations for construction of numerical models. The boundary between a partially contracted weir and a fully contracted weir was established by dimensionless approach channel width of the value 0.32, the flow characteristics (water surface, velocity) in the full range of the partially contracted weir (dimensionless approach channel width in range 0.32 ≤ BU* ≤ 1.00), and recommendations for the placement of a cross-section to measure water surface level for determine the heads (dimensionless distance −4 ≤ x* ≤ −2) were verified.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Hydrology and Hydromechanics

ISSN

0042-790X

e-ISSN

1338-4333

Svazek periodika

73

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

10

Strana od-do

132-142

Kód UT WoS článku

001512975000003

EID výsledku v databázi Scopus

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