Free flow over a partially contracted thin-plate weir with a triangular notch ofangle 20.23° and zero weir height
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Free flow over a partially contracted thin-plate weir with a triangular notch ofangle 20.23° and zero weir height
Original language description
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.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20101 - Civil engineering
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Hydrology and Hydromechanics
ISSN
0042-790X
e-ISSN
1338-4333
Volume of the periodical
73
Issue of the periodical within the volume
2
Country of publishing house
SK - SLOVAKIA
Number of pages
10
Pages from-to
132-142
UT code for WoS article
001512975000003
EID of the result in the Scopus database
—