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Problems during import of fluent mesh
Hello FOAMER,
I'm new in the world of OpenFoam. I simulate with Ansys CFX and Fluent before. I calculate turbomachinerys. Now, I want to import a mesh from fluent to OpenFoam. All worked fine. But when I checked the Mesh the following error-message turn up: // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create polyMesh for time = 0 Time = 0 Mesh stats points: 1928789 internal points: 1694027 faces: 16609221 internal faces: 16148136 cells: 7808059 faces per cell: 4.19533 boundary patches: 13 point zones: 0 face zones: 3 cell zones: 3 Overall number of cells of each type: hexahedra: 0 prisms: 1521519 wedges: 0 pyramids: 3602 tet wedges: 0 tetrahedra: 6282938 polyhedra: 0 Checking topology... ****Problem with boundary patch 0 named inlet of type patch. The patch should start on face no 16148136 and the patch specifies 16608933. Possibly consecutive patches have this same problem. Suppressing future warnings. ***Boundary definition is in error. Cell to face addressing OK. Point usage OK. Upper triangular ordering OK. Face vertices OK. *Number of regions: 3 The mesh has multiple regions which are not connected by any face. <<Writing region information to "0/cellToRegion" Checking patch topology for multiply connected surfaces... Patch Faces Points Surface topology inlet 230 206 ok (non-closed singly connected) outlet 58 41 ok (non-closed singly connected) wall-zusammenbau.ipt-laufrad253364 127485 ok (non-closed singly connected) wall-zusammenbau.ipt-zustroemung51769 25927 ok (non-closed singly connected) wall-zusammenbau.ipt-spiralgehaeuse16666 9629 ok (non-closed singly connected) wall_stat_rot-zusammenbau.ipt-spiralgehaeuse15883 8239 ok (non-closed singly connected) wall_stat_rot-zusammenbau.ipt-zustroemung54260 27289 ok (non-closed singly connected) iface_inlet_rotor_r 5801 3734 ok (non-closed singly connected) iface_outlet_rotor_r26251 16303 ok (non-closed singly connected) iface_inlet_rotor_zu4478 3017 ok (non-closed singly connected) iface_spirale_zustroemung_zu802 743 ok (non-closed singly connected) iface_spirale_zustroemung_sp7718 4212 ok (non-closed singly connected) iface_outlet_rotor_sp23805 12538 ok (non-closed singly connected) Checking geometry... Overall domain bounding box (-0.046 -0.841397 -0.99) (2.019 2.63 0.722329) Mesh (non-empty, non-wedge) directions (1 1 1) Mesh (non-empty) directions (1 1 1) Boundary openness (8.78283e-16 1.25826e-16 7.37172e-18) OK. Max cell openness = 6.40899e-16 OK. Max aspect ratio = 22.1214 OK. Minimum face area = 2.47887e-09. Maximum face area = 0.00689013. Face area magnitudes OK. Min volume = 7.05732e-13. Max volume = 0.00015816. Total volume = 1.32234. Cell volumes OK. Mesh non-orthogonality Max: 79.1261 average: 17.6258 *Number of severely non-orthogonal faces: 195. Non-orthogonality check OK. <<Writing 195 non-orthogonal faces to set nonOrthoFaces Face pyramids OK. ***Max skewness = 5.42954, 24 highly skew faces detected which may impair the quality of the results <<Writing 24 skew faces to set skewFaces Coupled point location match (average 0) OK. Failed 1 mesh checks. End What could be a reason? When I run my case with k-epsilon it doesn't work. After 5 timesteps the timestep continuty error is verhy high. But when I try without turbulence model it would be better.... Thanks in advance. Lancester |
Is it possible, that the problem is because of using different mesh-regions? I use 3 regions. Maybe it doens't worked with multiple regions. So I try to import the regions seperate and then I merge them together?
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Nevertheless, in OpenFOAM, when you have multiple regions, you have to use the utility splitMeshRegion to split the mesh into subMeshes and have a 0, constant and system directory for each of the region. Check out chtMultiRegionFoam in the heatTransfer directory for ideas regarding how to set up multi-region simulations in OpenFOAM. regards, Jace |
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