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Simulation of a density current turbulent flow employing different RANS models- a comparative study

Mehdizadeh, A ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. Publisher: 2008
  3. Abstract:
  4. The accuracy of Reynolds averaged Navier-Stokes (RANS) turbulence models to predict the behavior of two-dimensional (2-D) density current has been examined. In this work, a steady density current is simulated by the κ -ε , κ -ε RNG, two-layer κ -ε and modified v 2̄ - f models. All models are compared with available experimental data. Density current with uniform velocity and concentration enters a channel via a sluice gate into a lighter ambient fluid and moves forward down-slope. The eddy-viscosity concept cannot accurately simulate this flow because of two stress production structures in it. Results show that all isotropic models have a weak outcome for this current, but with improving the ability of the models the results become better. Copyright © 2008 by Ayyoub Mehdizadeh Momen
  5. Keywords:
  6. A-density ; Ambient fluids ; Comparative studies ; Density currents ; Eddy viscosity ; Experimental data ; Isotropic models ; RANS models ; Reynolds-averaged navier-stokes ; Sluice gates ; Stress production ; Two layers ; Aerospace engineering ; Navier stokes equations ; Turbulence models ; Computer simulation
  7. Source: 46th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, 7 January 2008 through 10 January 2008 ; 2008 ; 9781563479373 (ISBN)
  8. URL: https://arc.aiaa.org/doi/abs/10.2514/6.2008-772