Název: Approximation of velocity distribution in open channel flow
Autoři: Ivanova, Irina ; Vlasák, Pavel ; Chára, Zdeněk ; Kysela, Bohuš
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering Mechanics 2010, Svratka (CZ), 2010-05-10 / 2010-05-13
Rok: 2010
Jazyk: eng
Abstrakt: The paper deals with approximation of spatial distribution of mean downstream velocity of sub-critical turbulent flow in an open rectangular channel with rough bed. New formulae of the local downstream velocity component Vx(y, z) dependence on the vertical coordinate y and lateral coordinate z were introduced. The vertical velocity profile was approximated by log-law and the power law was used to describe the effect of channel walls on the horizontal velocity profile. The suggested formulae of spatial downstream velocity component distribution were calibrated and verified using the experimental data obtained by PIV method. The proposed approximation is in good agreement with experimental data, the difference between experimental and calculated data is in range of 5 - 10% except the area near the channel’s corners and water level, where the maximal difference reaches 60% and 30% of experimental values, respectively.
Klíčová slova: channel flow; lateral profile; logarithmic law; power law; spatial velocity profile; vertical profile
Číslo projektu: CEZ:AV0Z20600510 (CEP), GA103/09/1718 (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Engineering Mechanics 2010, ISBN 978-80-87012-26-0

Instituce: Ústav pro hydrodynamiku AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v repozitáři Akademie věd.
Původní záznam: http://hdl.handle.net/11104/0185571

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-41448


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav pro hydrodynamiku
Konferenční materiály > Příspěvky z konference