Hi Tri Dat,
Bernd was right and you were probably the first one computing on a 2d in
3d grid with box.
I looked into it today. The box sub control volume face computed the
wrong normal for dim=2 and dimWorld=3.
I fixed this on a branch feature/ *discrete-fracture-2d3d-test
<https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/commits/feature/discrete-fracture-2d3d-test>*.
This makes everything converge for my little fracture network. However,
something on the boundaries looks still strange (saturation greater than
1, I tested the 2p model).
I implemented the same problem on our feature/globalvectors branch that
has some major changes and improvements over the current version. There,
everything looked fine.
We have to look into the issue on the boundaries, so stay tuned.
Best wishes
Timo
On 22.07.2016 14:15, NGO Tri Dat wrote:
Hi Bernd,
You can find, in the attached file, the source files of the test case.
Please let me know if you cannot compile the program.
Thank you for your help.
Kind regards,
Tri Dat
*De :*Dumux [mailto:dumux-boun...@listserv.uni-stuttgart.de] *De la
part de* Bernd Flemisch
*Envoyé :* vendredi 22 juillet 2016 12:09
*À :* DuMuX User Forum
*Objet :* Re: [DuMuX] Convergence problem with FoamGrid 2D3D + Box method
Hi Tri Dat,
you might be the first one that tries to run Dumux on a non-manifold
2d-in-3d grid, so I'm not that surprised that you run into problems.
Can you send me the grid, problem, spatialparams and main files so
that we can have a closer look?
Kind regards
Bernd
On 07/22/2016 11:51 AM, NGO Tri Dat wrote:
Hi Dumuxers,
I have a convergence problem with my simulations of 1p flow in a
DFN using FoamGrid (as in the attached file). The fractures is 2D
embedded in a 3D bloc of 100x100x8 m^3. The matrix is assumed to
be impervious. A pressure gradient is prescribed along the X-axis.
Box method and AMG Backend are used.
The error message is:
/Dune reported error: Dune::MathError
[timeIntegration:/work/irlin104_1/ngotr/DUNE/dumux-2.9.0/dumux/implicit/problem.hh:662]:
Newton solver didn't converge after 10 time-step divisions.
dt=9.76563e-14. The solutions of the current and the previous time
steps have been saved to restart files./
Any hints will be greatly appreciated.
Kind regards,
Tri Dat Ngo
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