Very Large Eddy Simulation for the Prediction of Unsteady Vortex Motion



A new turbulence model for Very Large Eddy Simulation, based on the extended k-ε model of Chen and Kim is developed and presented in this paper. Introducing an adaptive filtering technique, the model can distinguish between numerically resolved and unresolved parts of flow. It is applied to the simulation of unstable vortex motion in a pipe trifurcation. This flow phenomenon cannot be predicted with classical RANS methods and commonly used turbulence models. Using the VLES method with the new turbulence model, the phenomenon is well predicted and the results agree reasonably well with measurement data.


Computational Fluid Dynamics Turbulence Model Large Eddy Simulation Loss Coefficient Vortex Motion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



filter function


local grid size


turbulent kinetic energy


Kolmogorov lengt scale


production term


local velocity


model constant


resolved length scale


time step


dissipation rate


kinematic visscosity


turbulent viscosity


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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Albert Ruprecht
    • 1
    • 2
  • Thomas Helmrich
    • 1
  • Ivana Buntic
    • 1
  1. 1.Institute of Fluid Mechanics and Hydraulic MachineryUniversity of StuttgartGermany
  2. 2.StuttgartGermany

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