Publication detail

Flow over thin-plate weirs with a triangular notch – influence of the relative width of approach channel with a rectangular cross-section

POSPÍŠILÍK, Š. ZACHOVAL, Z. GABRIEL, P.

Original Title

Flow over thin-plate weirs with a triangular notch – influence of the relative width of approach channel with a rectangular cross-section

Type

journal article in Web of Science

Language

English

Original Abstract

The article deals with the determination of the influence of the relative width of an approach channel with a rectangular cross-section on the discharge of clean water flowing over thin-plated weirs with a triangular notch and zero height of the weir above the bottom of the approach channel. To evaluate the influence, the Kindsvater-Shen equation was modified by introducing the basic effective discharge coefficient and the coefficient of the relative width of the approach channel. The coefficient of the relative width of the approach channel was determined based on the evaluation of data from three extensive experimental research investigations. It is valid for the entire possible range of relative widths of the approach channel and for the range of notch angles from 5.25° to 91.17°. The relative error of discharge determination is approximately up to ±2% over the entire range of discharges used in the conducted experimental research. The evaluation made it possible to determine the boundary distinguishing the partially contracted weirs from the fully contracted weirs in terms of impact on discharge.

Keywords

Triangular notch (V-notch); Thin-plate weir; Kindsvater-Shen formula; Coefficient of the relative width.

Authors

POSPÍŠILÍK, Š.; ZACHOVAL, Z.; GABRIEL, P.

Released

1. 6. 2024

Publisher

Institute of Hydrology of the Slovak Academy of Sciences

Location

Bratislava

ISBN

1338-4333

Periodical

Journal of Hydrology and Hydromechanics

Year of study

72

Number

2

State

Slovak Republic

Pages from

199

Pages to

206

Pages count

8

URL

https://sciendo.com/article/10.2478/johh-2024-0008

Full text in the Digital Library

http://hdl.handle.net/11012/249345

BibTex

@article{BUT188677,
  author="Šimon {Pospíšilík} and Zbyněk {Zachoval} and Pavel {Gabriel}",
  title="Flow over thin-plate weirs with a triangular notch – influence of the relative width of approach channel with a rectangular cross-section",
  journal="Journal of Hydrology and Hydromechanics",
  year="2024",
  volume="72",
  number="2",
  pages="199--206",
  doi="10.2478/johh-2024-0008",
  issn="1338-4333",
  url="https://sciendo.com/article/10.2478/johh-2024-0008"
}