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Numerical and experimental study of separated flow in a plane asymmetric diffuser
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2004 (English)In: International Journal of Heat and Fluid Flow, ISSN 0142-727X, E-ISSN 1879-2278, Vol. 25, no 3, 451-460 p.Article in journal (Refereed) Published
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Text
Abstract [en]

Computations of the turbulent flow through plane asymmetric diffusers for opening angles from 8degrees to 10degrees have been carried out with the explicit algebraic Reynolds stress model (EARSM) of Wallin and Johansson [J. Fluid Mech. 403 (2000) 89]. It is based on a two-equation platform in the form of a low-Re K - omega formulation, see e.g. Wilcox [Turbulence Modeling for CFD, DCW Industries Inc., 1993]. The flow has also been studied experimentally for the 8.5degrees opening angle using PIV and LDV. The models under-predict the size and magnitude of the recirculation zone. This is, at least partially, attributed to an over-estimation of the wall normal turbulence component in a region close to the diffuser inlet and to the use of damping functions in the near-wall region. By analyzing the balance between the production and dissipation of the turbulence kinetic energy we find that the predicted dissipation is too large. Hence, we can identify a need for improvement of the modeling the transport equation for the turbulence length-scale related quantity.

Place, publisher, year, edition, pages
2004. Vol. 25, no 3, 451-460 p.
Keyword [en]
plane asymmetric diffuser, separated flow, explicit algebraic Reynolds stress model, EARSM, automated code generation
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:sh:diva-30134DOI: 10.1016/j.ijheatfluidflow.2004.02.012ISI: 000222282000014Scopus ID: 2-s2.0-2542557398OAI: oai:DiVA.org:sh-30134DiVA: diva2:939746
Conference
3rd International Symposium on Turbulence and Shear Flow Phenomena (TSFP-3) Sendai, JAPAN, JUN 25-27, 2003
Available from: 2006-08-09 Created: 2016-06-01 Last updated: 2016-06-20Bibliographically approved

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Amberg, GustavJohansson, Arne V.
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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf