Difference between K-epsilon and K-omega Turbulence Model

- May 11, 2018 at 7:46 pm
  
  Burhan
  Subscriber
  
  I am doing simulation of "Vortex Tube" in which compressed air swirl through out the body.
  
  1-Which Model can I use (k-e or k-w) ? I want to converge result fast. Suggest me briefly please.
- May 12, 2018 at 4:50 pm
  
  raul.raghav
  Subscriber
  
  Based on the quick literature review, it seems that the Standard k-e model predicts the flow better than the other turbulence models. But you might also want to look into the k-w SST model with curvature correction. Look into the following articles for more information:
  
  Comparison of different turbulence models in predicting the temperature separation in a Ranque–Hilsch vortex tube
  
  CFD analysis of energy separation of vortex tube employing different gases, turbulence models and discretisation schemes
- May 13, 2018 at 8:41 pm
  
  Raef.Kobeissi
  Subscriber
  
  k- epsilon model poorly resolves the viscous layer unline K-Omega model. Furthermore, k-ω model is good in resolving internal flows, separated flows and jets and flows with high-pressure gradient and also internal flows through curved geometries. You always need to make sure that you have a proper mesh at the boundary wall by abiding by the correct Y Plus value.