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.
Original 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

Keywords

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

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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.