Turbulence modelling in OpenFoam
I find some difficulties defining the right parameters related to turbulence modelling in OpenFoam. in fact, I tried to follow the same steps available in the user guide to set a turbulence model but the result is always the same, my simulations /when I set up a case from scratch/ crash with very high bounding values of turbulence parameters after the first time steps.
How can I learn how to set up an accurate turbulence model please? I can t find a tutorial that focuses on that in particular / a part from user guide/...
Any advice and guidelines are welcome too.
Thanks in advance.
Are you using RANS or LES?
Often this type of crash is caused by a bad initial condition or/and by (incompatible) boundary conditions. One 'trick' that can help obtaining better initial conditions is by running potentialFoam first for a number of time steps...
For RANS-based simulations ( and you're sure your boundary conditions are correct), in addition to potentialFoam as an initial condition you can:
These are just some quick tips.
Dan and Lieven thank you for these hints.
I will try to apply it to a case and see what happens.
BUT how to make sure the BC are the right ones too please?
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