Validation of two- and three-equation wall-distance free turbulence models

D. Drikakis, U. Goldberg

Research output: Contribution to conferencePaper

Abstract

A comparative study of low-Re wall-distance-free (WDF) turbulence models applied to incompressible flows is presented. The study includes the WDF k-ε and the three-equation WDF k-ε-γ as well as two k-ε models which involve the distance from the wall. Comparison with direct-numerical-simulation data reveals that the WDF models provide more accurate results for the dissipation rate, especially in the near wall region. A grid refinement study also reveals that models which explicitly involve the distance from the wall cannot capture the correct turbulence dissipation rate behaviour in the near-wall region even on the finest grid, where grid-independent solution is achieved. The low-Re WDF models require, however, increased number of iterations. Results are presented for channel and backward-facing step flows.
LanguageEnglish
Number of pages9
Publication statusPublished - 26 Jun 1997
EventASME Fluids Engineering Division Summer Meeting, FEDSM97 - Vancouver, Canada
Duration: 22 Jun 199726 Jun 1997

Conference

ConferenceASME Fluids Engineering Division Summer Meeting, FEDSM97
Abbreviated titleFEDSM 97
CountryCanada
CityVancouver
Period22/06/9726/06/97

Fingerprint

Turbulence Model
Turbulence models
Incompressible flow
Direct numerical simulation
Dissipation
Turbulence
Grid
Backward-facing Step
Grid Refinement
Incompressible Flow
Model
Comparative Study
Iteration

Keywords

  • channel flow
  • wall flow
  • Reynolds number
  • mathematical models
  • iterative methods
  • computer simulation

Cite this

Drikakis, D., & Goldberg, U. (1997). Validation of two- and three-equation wall-distance free turbulence models. Paper presented at ASME Fluids Engineering Division Summer Meeting, FEDSM97, Vancouver, Canada.
Drikakis, D. ; Goldberg, U. / Validation of two- and three-equation wall-distance free turbulence models. Paper presented at ASME Fluids Engineering Division Summer Meeting, FEDSM97, Vancouver, Canada.9 p.
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Drikakis, D & Goldberg, U 1997, 'Validation of two- and three-equation wall-distance free turbulence models' Paper presented at ASME Fluids Engineering Division Summer Meeting, FEDSM97, Vancouver, Canada, 22/06/97 - 26/06/97, .

Validation of two- and three-equation wall-distance free turbulence models. / Drikakis, D.; Goldberg, U.

1997. Paper presented at ASME Fluids Engineering Division Summer Meeting, FEDSM97, Vancouver, Canada.

Research output: Contribution to conferencePaper

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AU - Goldberg, U.

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KW - channel flow

KW - wall flow

KW - Reynolds number

KW - mathematical models

KW - iterative methods

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M3 - Paper

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Drikakis D, Goldberg U. Validation of two- and three-equation wall-distance free turbulence models. 1997. Paper presented at ASME Fluids Engineering Division Summer Meeting, FEDSM97, Vancouver, Canada.