Difference between revisions of "Sig Turbulence / Collection of additional turbulence models"

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* Download
 
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== Hybrid RANS-LES  ==
 
== Hybrid RANS-LES  ==

Revision as of 12:49, 5 July 2009

1 Comment

This site should be a collection of new implemented turbulence models

As soon as the model is stable and does not need any further developing, it should be marked and copied to svn.

2 Incompressible

2.1 RANS

Descriptions of implementations of added incompressible RAS models can be found here:

2.1.1 v2f family

2.1.1.1 v2-f

  • Field of application
  • Short description
  • Problems / Difficulties with the implementation
  • Literature
  • Small Example Case
  • Download


2.1.1.2 zeta-f

  • Field of application
  • Short description
  • Problems / Difficulties with the implementation
  • Literature
  • Small Example Case
  • Download


2.1.2 Models with advanced wall treatment

2.1.2.1 kOmega-SST (CWT)

  • Short description

This model is based on the 'default' OpenFoam kOmegaSST implementation with some adjustemts to get an enhanced/compound wall treatment (similar to FLUENT). The implementation is based on Popovac/Hanjalic.

  • Problems / Difficulties with the implementation

It seems to work for some meshes quite well (the range up to y+=0.3-10 and from 20- around 40 (?) works well, at least the results are similar to the default tutorial for the Launder-Sharma model; I did not test a u+/y+ view yet...). I would be nice, if you can test the model on your test case and give some suggestion for improvement!? Basically I just coupled the boundary conditions for omega, the turbulent kinetic energy production and viscosity for the low-Re and high-Re case using a function like exp(-Gamma). Right now, I set the values in the wall nearest cell (faceCelli), though I am not sure, if they have to get set at the boundary face (facei) as well!?

  • Literature

Popovac, M., Hanjaliæ, K., 2007, Compound wall treatment for RANS computations for complex turbulent flows and heat transfer. Flow, Turbulence and Combustion, 78(2), 177-202

  http://repository.tudelft.nl/file/354721/370010
  • Small Example Case

This is aquite simple test case for RANS models based on the boundaryFoam tutorial. It should be quite simple to run.

  • Download

Valid versions: OF version 15.png


2.2 Hybrid RANS-LES

2.2.1 Blending Turbulence Models

2.2.2 Interfacing RANS and LES models

2.2.3 URANS 2nd Generation

2.3 LES

3 Incompressible (Buoyancy)

3.1 RANS

3.2 Hybrid RANS-LES

3.3 LES

4 Incompressible