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cyclicGgi and AMG solvers

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Old   July 25, 2014, 09:41
Default cyclicGgi and AMG solvers
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Ivor Clifford
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I am trying to use cyclicGgi boundaries in combination with AMG solvers in foam-extend 3.1 and receive the following error:
Code:
--> FOAM FATAL ERROR:
Error in interface update: incorrect size of zone fields
Field size = 656 Zone size = 451

    From function ggiGAMGInterfaceField::updateInterfaceMatrix
    in file matrices/lduMatrix/solvers/GAMG/interfaceFields/ggiGAMGInterfaceField/ggiGAMGInterfaceField.C at line 114.

FOAM aborting
I've tried this with GAMG and the AMG solvers in lduSolvers and the result is the same. Is there an incompatibility between this combination of BCs and solver.

Thanks advance
Ivor
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Old   July 27, 2014, 03:56
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Hrvoje Jasak
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No incompatibility: this must work and we have tutorials + test loop items using it.

Did you set up the zones correctly? If so, can you share the case - I'd like to have a look.

Hrv
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Old   July 30, 2014, 09:24
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Ivor Clifford
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Hi Hrv,
I would have thought it should work as well. The mesh works fine using AMI on OF-2.2.1, I'm also fairly certain the zone definitions are correct since there are no issues using the standard conjugate gradient solver with incomplete Cholesky preconditioning. The only thing I think it could be is the mesh quality. I'm trying to use cfMesh for the meshing and am still working through some issues capturing the feature edges and boundary layers correctly.
Unfortunately the geometry is proprietary and it's not mine to give away. I will try to reproduce the error using modified geometry and then I can perhaps send it to you.

Best Regards
Ivor
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