Detail publikace

Influence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing step

VOLAVÝ, J. FORMAN, M. JÍCHA, M.

Originální název

Influence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing step

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

Large Eddy Simulation, backward facing step, inlet boundary condition

Autoři

VOLAVÝ, J.; FORMAN, M.; JÍCHA, M.

Rok RIV

2011

Vydáno

9. 4. 2012

Nakladatel

EDP Sciences

ISBN

978-80-7372-784-0

Kniha

EPJ Web of Conferences

ISSN

2100-014X

Periodikum

EPJ Web of Conferences

Ročník

25

Číslo

1

Stát

Francouzská republika

Strany od

485

Strany do

489

Strany počet

5

URL

https://www.epj-conferences.org/articles/epjconf/abs/2012/07/epjconf_EFM2011_01099/epjconf_EFM2011_01099.html

Plný text v Digitální knihovně

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"
}