Stationary turbulence modeling (RAS) by Jozsef Nagy

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Revision as of 05:18, 8 January 2020 by Jozsef Nagy (talk | contribs)
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Go back to Day 7.

Stationary turbulence modelling (RAS)

steady-state velocity distribution

Most of the real life problems you would like to tackle include some sort of turbulence. These videos

will give you a detailed explanation on steady-state turbulence modelling in OpenFOAM. It is important to understand the difference between models and which one to choose for a given problem. It is also important to know, how to select a specific model and what you have to change in order to run a successful simulation. You will learn about

  • steady-state turbulence modelling
  • Reynolds-Averaged Navier-Stokes equations
  • RAS models
  • case setup
  • boundary and initial conditions
  • post processing

You can download the blockMeshDict here. (left click on it, then right click on Raw, then save as)

For older versions of OpenFOAM the blockMeshDict file is located in constant/polyMesh, for newer versions the file is located in system.
In newer versions of OpenFOAM the RASProperties dictionary is replaced by turbulenceProperties, however the important entries remain the same.
In newer versions of OpenFOAM the commands yPlus, yPlusLES and/or yPlusRAS are not used. Instead AFTER your simulation run the command simpleFoam -postProcess -func yPlus