I can finally release the modi
 

I can finally release the modified version of twoPhaseEulerFoam.
It includes:

- Two additional drag models for gas-particle flows (Gidaspow, Syamlal-O'Brian).

- Additional radial distribution functions for the kinetic theory and their derivative.

- Additional granular pressure models and derivatives of the granular pressure coefficient.

- Additional frictional stress models.

- Variable averaging.

- Implementation of a "packing limiter" algorithm to try to stabilize the solution when the kinetic theory is used.
The implemented algorithm is just a trick to avoid numerical instabilities due to the discontinuity in the radial distribution function at the packing limit. However it requires quite a small time step. I think a more refined, less intrusive and robust method is needed such as some sort of relaxation of the granular pressure coupled to an implicit limitation on the particle-phase volume fraction similar to what done when the normal stress modulus is used in the same solver. Ideas and volunteers are welcome ;-)

- Correction of the zeroGradient BC proposed by Henry Weller and sent to me by Rasmus (thanks!).

I attach the code, an example and a detailed list of changes.

Sorry for the multiple post. I
 

Sorry for the multiple post. I has some problem due to the size of the attachments.
The code and the changelog are here:

http://www.cfd-online.com/OpenFOAM_D...hment_icon.gif twoPhaseEulerFoam.tar.gz

http://www.cfd-online.com/OpenFOAM_D...hment_icon.gif Changes

The example case is too big to be uploaded. It can be downloaded here:
http://www.albertopassalacqua.com/in...id=9&Itemid=27

Best regards,
Alberto