[atlan]

Can anybody advise mi with the following problem connected to the chtMultiRegionSimpleFoam?



I run chtMultiRegionSimpleFoam with turbulence model but the simulation fails after 3 iterations even when I set the inlet temperature to zero and there is no temperature gradient (all temperature BC have the same temperature). When the model is laminar the convergence is without any problem. When I run the same model with chtMultiRegionFoam the convergence is also without any problem.



Has anybody some experiences with this problem? The mesh quality is I think OK


Mesh stats
points: 1324068
faces: 3857346
internal faces: 3742722
cells: 1266678
faces per cell: 6
boundary patches: 6
point zones: 0
face zones: 0
cell zones: 2

Overall number of cells of each type:
hexahedra: 1266678
prisms: 0
wedges: 0
pyramids: 0
tet wedges: 0
tetrahedra: 0
polyhedra: 0

Checking topology...
Boundary definition OK.
Cell to face addressing OK.
Point usage OK.
Upper triangular ordering OK.
Face vertices OK.
Number of regions: 1 (OK).

Checking patch topology for multiply connected surfaces...
Patch Faces Points Surface topology
outlet 132 165 ok (non-closed singly connected)
inlet 270 327 ok (non-closed singly connected)
wall 30426 30864 ok (non-closed singly connected)
lava 7284 7638 ok (non-closed singly connected)
solid_side1 30312 30750 ok (non-closed singly connected)
solid_side2 46200 46644 ok (non-closed singly connected)

Checking geometry...
Overall domain bounding box (-0.155 -0.155 -7.06635e-010) (0.155 0.155 0.15)
Mesh (non-empty, non-wedge) directions (1 1 1)
Mesh (non-empty) directions (1 1 1)
Boundary openness (2.39061e-016 4.07968e-016 -3.65159e-015) OK.
Max cell openness = 3.82736e-016 OK.
Max aspect ratio = 6.07907 OK.
Minimum face area = 2.41553e-007. Maximum face area = 1.58724e-005. Face area magnitudes OK.
Min volume = 1.91764e-010. Max volume = 2.56454e-008. Total volume = 0.00975473. Cell volumes OK.
Mesh non-orthogonality Max: 54.607 average: 5.3253
Non-orthogonality check OK.
Face pyramids OK.
Max skewness = 1.29129 OK.
Coupled point location match (average 0) OK.

Mesh OK.

End