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Incorrect particle-wall interaction in OpenFOAM 6

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Old   June 27, 2019, 11:42
Default Incorrect particle-wall interaction in OpenFOAM 6
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I am working on particle filtering in a bend pipe geometry. I recently switch from version OF2.2x to OF6. I found out that the interaction of particles with the walls in not correct in OF6. I observed that a particle sticks on the wall only when itís center touches the wall. However the particle must stick on the wall when itís surface touches the wall. In other words, itís diameter should be taken into account to check whether there is contact to the wall. I have tested this in OF2.2x and it was working properly. Perhaps this is a bug in OpenFOAM 6?
See the attached images.

Thanks in advance.
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File Type: jpg OF6.jpg (21.0 KB, 38 views)
File Type: jpg OF22x.jpg (27.4 KB, 36 views)
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Old   July 3, 2019, 17:44
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Utkan Caliskan
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You must be using MPPICFoam instead of DPMFoam. In DPMFoam, the center of the particles won't touch the wall if you turn pairCollision model on. I think it's because of the difference between wall collision models of MPPICFoam and DPMFoam.
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