Publication detail
Large Eddy Simulation of backward facing step
VOLAVÝ, J. JÍCHA, M.
Czech title
Large Eddy Simulation of backward facing step
English title
Large Eddy Simulation of backward facing step
Type
conference paper
Language
en
Original abstract
Large Eddy Simulations of backward facing step were performed. One of the difficulties of Large Eddy Simulation is correct representation of the turbulence on the inlet to the region. Therefore the simulations were done using different approaches to the inlet boundary condition. The impact of the choice of inlet boundary condition treatment on the fluid flow is consequently studied. It has shown, that using uniform velocity profile on inlet and even prescribing turbulent mean velocity profile without proper representation of turbulence fluctuations leads to unrealistic results. The only approach used in this work which gives sufficiently accurate solution is direct mapping of velocity from plane positioned behind the inlet back to the inlet.
Czech abstract
Large Eddy Simulations of backward facing step were performed. One of the difficulties of Large Eddy Simulation is correct representation of the turbulence on the inlet to the region. Therefore the simulations were done using different approaches to the inlet boundary condition. The impact of the choice of inlet boundary condition treatment on the fluid flow is consequently studied. It has shown, that using uniform velocity profile on inlet and even prescribing turbulent mean velocity profile without proper representation of turbulence fluctuations leads to unrealistic results. The only approach used in this work which gives sufficiently accurate solution is direct mapping of velocity from plane positioned behind the inlet back to the inlet.
English abstract
Large Eddy Simulations of backward facing step were performed. One of the difficulties of Large Eddy Simulation is correct representation of the turbulence on the inlet to the region. Therefore the simulations were done using different approaches to the inlet boundary condition. The impact of the choice of inlet boundary condition treatment on the fluid flow is consequently studied. It has shown, that using uniform velocity profile on inlet and even prescribing turbulent mean velocity profile without proper representation of turbulence fluctuations leads to unrealistic results. The only approach used in this work which gives sufficiently accurate solution is direct mapping of velocity from plane positioned behind the inlet back to the inlet.
Keywords in English
Large Eddy Simulation, inlet boundary condition
RIV year
2011
Released
22.06.2011
Publisher
Technikcá univerzita v Liberci
Location
Liberec
ISBN
978-80-7372-747-5
Book
30, Setkání kateder mechaniky tekutin a termomechaniky
Edition number
1
Pages from–to
269–272
Pages count
4
BIBTEX
@inproceedings{BUT74076,
author="Jaroslav {Volavý} and Miroslav {Jícha},
title="Large Eddy Simulation of backward facing step",
booktitle="30, Setkání kateder mechaniky tekutin a termomechaniky",
year="2011",
month="June",
pages="269--272",
publisher="Technikcá univerzita v Liberci",
address="Liberec",
isbn="978-80-7372-747-5"
}