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Old   November 7, 2006, 07:51
Default I can finally release the modi
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Alberto Passalacqua
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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.










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GeekoCFD text mode - A smaller version of GeekoCFD, text-mode only, with only OpenFOAM. Available in a variety of virtual formats.
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Old   November 7, 2006, 08:09
Default Sorry for the multiple post. I
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Alberto Passalacqua
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alberto will become famous soon enoughalberto will become famous soon enough
Sorry for the multiple post. I has some problem due to the size of the attachments.
The code and the changelog are here:

twoPhaseEulerFoam.tar.gz

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
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GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as live DVD/USB, hard drive image and virtual image.
GeekoCFD 32bit - The 32bit edition of GeekoCFD.
GeekoCFD text mode - A smaller version of GeekoCFD, text-mode only, with only OpenFOAM. Available in a variety of virtual formats.
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