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[Commercial meshers] Problems with ANSYS mesh conversion |
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March 31, 2016, 18:31 |
Problems with ANSYS mesh conversion
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#1 |
New Member
Thomas A
Join Date: Mar 2016
Posts: 18
Rep Power: 10 |
Hi
I'm new to the forum and relatively new to OpenFoam. I'm trying to create a mesh from an ANSYS mesh file. I have done the following. I've made a structure using SolidWorks, saving it as .sldprt and then importing it to Workbench. I meshed the structure and then made named selections for all of the surfaces, I then changed the options for the .msh to use ASCII formating and then exported the mesh as .msh. When I run the fluentMeshToFoam command in OpenFoam I get the following output. In the output it says that it "Found 12208 undefined faces in mesh; adding to default patch. done." which I don't understand, I don't know how to do it any other way. In order to make sure the mesh was in fact bad, I also ran checkMesh, which is the second output - it gave two errors. From what I understand from the errors, it's a bad mesh, but in what way should I change it? I've attached my .msh, .sldprt and Workbench project file as a zip in the following link. I hope you guys can help :-) https://www.dropbox.com/s/bykl259mvq...sign1.zip?dl=0 Code:
bash-4.1$ fluentMeshToFoam abc.msh /*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v3.0+ | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : v3.0+-e941ee6c15e9 Exec : fluentMeshToFoam abc.msh Date : Mar 30 2016 Time : 13:49:04 Host : "a531e13bda1b" PID : 187 Case : /Users/thomasagger/Dropbox/00001/square nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Embedded blocks in comment or unknown: ( Embedded blocks in comment or unknown:( Found end of section in unknown:) Embedded blocks in comment or unknown:( Found end of section in unknown:) Found end of section in unknown:) Embedded blocks in comment or unknown: ( Embedded blocks in comment or unknown:( Found end of section in unknown:) Embedded blocks in comment or unknown: ( Found end of section in unknown:) Found end of section in unknown:) Embedded blocks in comment or unknown: ( Embedded blocks in comment or unknown:( Found end of section in unknown:) Found end of section in unknown:) Embedded blocks in comment or unknown: ( Embedded blocks in comment or unknown:( Found end of section in unknown:) Embedded blocks in comment or unknown:( Found end of section in unknown:) Found end of section in unknown:) Dimension of grid: 3 Number of points: 7826 number of faces: 58998 Number of cells: 26447 Reading points Reading points Reading uniform faces Reading uniform faces Reading uniform faces Reading uniform faces Reading uniform faces Reading uniform faces Reading uniform faces Other readCellGroupData: 2 1 674f 1 2 Reading uniform cells Read zone1:1 name:interior-design1 patchTypeID:interior Reading zone data Read zone1:2 name:design1 patchTypeID:fluid Reading zone data Read zone1:5 name:movingwall patchTypeID:wall Reading zone data Read zone1:6 name:fixedwall patchTypeID:wall Reading zone data Read zone1:7 name:inlet patchTypeID:velocity-inlet Reading zone data Read zone1:8 name:cyclic1 patchTypeID:wall Reading zone data Read zone1:9 name:cyclic2 patchTypeID:wall Reading zone data Read zone1:10 name:out patchTypeID:pressure-outlet Reading zone data FINISHED LEXING dimension of grid: 3 Creating shapes for 3-D cells Building patch-less mesh...--> FOAM Warning : From function Foam::polyMesh::polyMesh(const Foam::IOobject&, const Foam::Xfer<Foam::Field<Foam::Vector<double> > >&, const cellShapeList&, const faceListList&, const wordList&, const wordList&, const Foam::word&, const Foam::word&, const wordList&, bool) in file meshes/polyMesh/polyMeshFromShapeMesh.C at line 596 Found 12208 undefined faces in mesh; adding to default patch. done. Building boundary and internal patches. Creating patch 0 for zone: 1 start: 1 end: 46790 type: interior name: interior-design1 Creating patch 1 for zone: 5 start: 46791 end: 50948 type: wall name: movingwall Creating patch 2 for zone: 6 start: 50949 end: 57529 type: wall name: fixedwall Creating patch 3 for zone: 7 start: 57530 end: 57573 type: velocity-inlet name: inlet Creating patch 4 for zone: 8 start: 57574 end: 57887 type: wall name: cyclic1 Creating patch 5 for zone: 9 start: 57888 end: 57929 type: wall name: cyclic2 Creating patch 6 for zone: 10 start: 57930 end: 58998 type: pressure-outlet name: out Patch interior-design1 is internal to the mesh and is not being added to the boundary. Adding new patch movingwall of type wall as patch 0 Adding new patch fixedwall of type wall as patch 1 Adding new patch inlet of type patch as patch 2 Adding new patch cyclic1 of type wall as patch 3 Adding new patch cyclic2 of type wall as patch 4 Adding new patch out of type patch as patch 5 Writing mesh... to "constant/polyMesh" done. End Code:
bash-4.1$ checkMesh /*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v3.0+ | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : v3.0+-e941ee6c15e9 Exec : checkMesh Date : Mar 30 2016 Time : 13:53:28 Host : "a531e13bda1b" PID : 188 Case : /Users/thomasagger/Dropbox/00001/square nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create polyMesh for time = 0 Time = 0 Mesh stats points: 7826 internal points: 1720 faces: 58998 internal faces: 46790 cells: 26447 faces per cell: 4 boundary patches: 6 point zones: 0 face zones: 0 cell zones: 0 Overall number of cells of each type: hexahedra: 0 prisms: 0 wedges: 0 pyramids: 0 tet wedges: 0 tetrahedra: 26447 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 movingwall 4158 2429 ok (non-closed singly connected) fixedwall 6581 3677 ok (non-closed singly connected) inlet 44 44 ok (non-closed singly connected) cyclic1 314 316 ok (non-closed singly connected) cyclic2 42 44 ok (non-closed singly connected) out 1069 1073 ok (non-closed singly connected) Checking geometry... Overall domain bounding box (-0.05783 -2.02804e-16 -0.02) (0.06783 0.0187325 0.02) Mesh has 3 geometric (non-empty/wedge) directions (1 1 1) Mesh has 3 solution (non-empty) directions (1 1 1) Boundary openness (-1.36456e-19 -8.41151e-16 1.95199e-19) OK. ***High aspect ratio cells found, Max aspect ratio: 5789.09, number of cells 780 <<Writing 780 cells with high aspect ratio to set highAspectRatioCells Minimum face area = 4.7198e-12. Maximum face area = 3.30474e-06. Face area magnitudes OK. Min volume = 3.19826e-18. Max volume = 4.27022e-10. Total volume = 3.26707e-07. Cell volumes OK. Mesh non-orthogonality Max: 89.917 average: 53.0697 *Number of severely non-orthogonal (> 70 degrees) faces: 17540. Non-orthogonality check OK. <<Writing 17540 non-orthogonal faces to set nonOrthoFaces Face pyramids OK. ***Max skewness = 5.87506, 3 highly skew faces detected which may impair the quality of the results <<Writing 3 skew faces to set skewFaces Coupled point location match (average 0) OK. Failed 2 mesh checks. End |
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March 31, 2016, 18:36 |
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#2 |
New Member
Thomas A
Join Date: Mar 2016
Posts: 18
Rep Power: 10 |
I just read the sticky note and then tried the Fluent3DMeshToFoam which seems to give less problems as seen in the attached output. But when I run the checkMesh I get the same errors, see attached output
Code:
bash-4.1$ fluent3DMeshToFoam design1.msh /*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v3.0+ | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : v3.0+-e941ee6c15e9 Exec : fluent3DMeshToFoam design1.msh Date : Mar 31 2016 Time : 21:33:50 Host : "a531e13bda1b" PID : 195 Case : /Users/thomasagger/Dropbox/00001/square nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Dimension of grid: 3 Number of points: 7826 Number of faces: 58998 Number of cells: 26447 PointGroup: 3 start: 0 end: 1719. Reading points...done. PointGroup: 4 start: 1720 end: 7825. Reading points...done. FaceGroup: 1 start: 0 end: 46789. Reading uniform faces...done. FaceGroup: 5 start: 46790 end: 50947. Reading uniform faces...done. FaceGroup: 6 start: 50948 end: 57528. Reading uniform faces...done. FaceGroup: 7 start: 57529 end: 57572. Reading uniform faces...done. FaceGroup: 8 start: 57573 end: 57886. Reading uniform faces...done. FaceGroup: 9 start: 57887 end: 57928. Reading uniform faces...done. FaceGroup: 10 start: 57929 end: 58997. Reading uniform faces...done. CellGroup: 2 start: 0 end: 26446 type: 1 Zone: 1 name: interior-design1 type: interior. Reading zone data...done. Zone: 2 name: design1 type: fluid. Reading zone data...done. Zone: 5 name: movingwall type: wall. Reading zone data...done. Zone: 6 name: fixedwall type: wall. Reading zone data...done. Zone: 7 name: inlet type: velocity-inlet. Reading zone data...done. Zone: 8 name: cyclic1 type: wall. Reading zone data...done. Zone: 9 name: cyclic2 type: wall. Reading zone data...done. Zone: 10 name: out type: pressure-outlet. Reading zone data...done. FINISHED LEXING Creating patch 0 for zone: 5 name: movingwall type: wall Creating patch 1 for zone: 6 name: fixedwall type: wall Creating patch 2 for zone: 7 name: inlet type: velocity-inlet Creating patch 3 for zone: 8 name: cyclic1 type: wall Creating patch 4 for zone: 9 name: cyclic2 type: wall Creating patch 5 for zone: 10 name: out type: pressure-outlet Creating cellZone 0 name: design1 type: fluid Creating faceZone 0 name: interior-design1 type: interior faceZone from Fluent indices: 0 to: 46789 type: interior patch 0 from Fluent indices: 46790 to: 50947 type: wall patch 1 from Fluent indices: 50948 to: 57528 type: wall patch 2 from Fluent indices: 57529 to: 57572 type: velocity-inlet patch 3 from Fluent indices: 57573 to: 57886 type: wall patch 4 from Fluent indices: 57887 to: 57928 type: wall patch 5 from Fluent indices: 57929 to: 58997 type: pressure-outlet Writing mesh to "/Users/thomasagger/Dropbox/00001/square/constant/region0" End Code:
bash-4.1$ checkMesh /*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v3.0+ | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : v3.0+-e941ee6c15e9 Exec : checkMesh Date : Mar 31 2016 Time : 21:34:16 Host : "a531e13bda1b" PID : 196 Case : /Users/thomasagger/Dropbox/00001/square nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create polyMesh for time = 0 Time = 0 Mesh stats points: 7826 internal points: 1720 faces: 58998 internal faces: 46790 cells: 26447 faces per cell: 4 boundary patches: 6 point zones: 0 face zones: 1 cell zones: 1 Overall number of cells of each type: hexahedra: 0 prisms: 0 wedges: 0 pyramids: 0 tet wedges: 0 tetrahedra: 26447 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 movingwall 4158 2429 ok (non-closed singly connected) fixedwall 6581 3677 ok (non-closed singly connected) inlet 44 44 ok (non-closed singly connected) cyclic1 314 316 ok (non-closed singly connected) cyclic2 42 44 ok (non-closed singly connected) out 1069 1073 ok (non-closed singly connected) Checking geometry... Overall domain bounding box (-0.05783 -2.02804e-16 -0.02) (0.06783 0.0187325 0.02) Mesh has 3 geometric (non-empty/wedge) directions (1 1 1) Mesh has 3 solution (non-empty) directions (1 1 1) Boundary openness (1.65459e-18 -3.97844e-15 4.77899e-18) OK. ***High aspect ratio cells found, Max aspect ratio: 5789.09, number of cells 780 <<Writing 780 cells with high aspect ratio to set highAspectRatioCells Minimum face area = 4.7198e-12. Maximum face area = 3.30474e-06. Face area magnitudes OK. Min volume = 3.19826e-18. Max volume = 4.27022e-10. Total volume = 3.26707e-07. Cell volumes OK. Mesh non-orthogonality Max: 89.917 average: 53.0697 *Number of severely non-orthogonal (> 70 degrees) faces: 17540. Non-orthogonality check OK. <<Writing 17540 non-orthogonal faces to set nonOrthoFaces Face pyramids OK. ***Max skewness = 5.87506, 3 highly skew faces detected which may impair the quality of the results <<Writing 3 skew faces to set skewFaces Coupled point location match (average 0) OK. Failed 2 mesh checks. End |
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ansys, mesh 3d, openfoam, workbench mesh |
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