Publication detail

Large Eddy Simulation of backward facing step

VOLAVÝ, J. JÍCHA, M.

Original 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.

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

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

1

Edition number

1

Pages from

269

Pages to

272

Pages count

4

BibTex


@inproceedings{BUT74076,
  author="Jaroslav {Volavý} and Miroslav {Jícha}",
  title="Large Eddy Simulation of backward facing step",
  annote="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.",
  address="Technikcá univerzita v Liberci",
  booktitle="30, Setkání kateder mechaniky tekutin a termomechaniky",
  chapter="74076",
  edition="1",
  howpublished="online",
  institution="Technikcá univerzita v Liberci",
  year="2011",
  month="june",
  pages="269--272",
  publisher="Technikcá univerzita v Liberci",
  type="conference paper"
}