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VOLAVÝ, J. FORMAN, M. JÍCHA, M.
Original Title
Influence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing step
Type
conference paper
Language
English
Original Abstract
The impact of the choice of inlet boundary condition treatment on the fluid flow is studied in this work. The correct representation of the turbulence at the inlet to the domain is essential for the accuracy of Large Eddy Simulation. The inappropriate specification of the inlet velocity has significant effect on the downstream flow pattern. The case of backward-facing step was used as a test case. Three different approaches of the inlet boundary conditions were studied: uniform velocity profile, mean velocity profile of the fully developed channel flow and velocity obtained from mapping velocity from plane positioned behind the inlet back to the inlet. The results of the simulations were compared with experimental results. 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.
Keywords
Large Eddy Simulation, backward facing step, inlet boundary condition
Authors
VOLAVÝ, J.; FORMAN, M.; JÍCHA, M.
RIV year
2011
Released
9. 4. 2012
Publisher
EDP Sciences
ISBN
978-80-7372-784-0
Book
EPJ Web of Conferences
2100-014X
Periodical
Year of study
25
Number
1
State
French Republic
Pages from
485
Pages to
489
Pages count
5
URL
https://www.epj-conferences.org/articles/epjconf/abs/2012/07/epjconf_EFM2011_01099/epjconf_EFM2011_01099.html
Full text in the Digital Library
http://hdl.handle.net/11012/193619
BibTex
@inproceedings{BUT75193, author="Jaroslav {Volavý} and Matěj {Forman} and Miroslav {Jícha}", title="Influence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing step", booktitle="EPJ Web of Conferences", year="2012", journal="EPJ Web of Conferences", volume="25", number="1", pages="485--489", publisher="EDP Sciences", doi="10.1051/epjconf/20122501099", isbn="978-80-7372-784-0", issn="2100-014X", url="https://www.epj-conferences.org/articles/epjconf/abs/2012/07/epjconf_EFM2011_01099/epjconf_EFM2011_01099.html" }