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August 28, 2018, 07:54 |
CFD analysis not converging
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#1 |
Member
Ruggero Poletto
Join Date: Nov 2013
Posts: 34
Rep Power: 12 |
Hello everyone,
I have a bit troubles with OpenFOAM and a mesh I made using SNAPPY. Basically I don't get it to converge!! I attach here the checkMesh result: Code:
/*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 5.x | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : 5.x-197d9d3bf20a Exec : checkMesh Date : Aug 28 2018 Time : 13:46:13 Host : "rupole1185-desktop" PID : 5212 I/O : uncollated Case : /home/rupole1185/PROJECT/opencases/SIMULAZIONI/ENG-35/MONOBLOCCO-4_5-STALLA nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10) allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create polyMesh for time = 0 Time = 0 Mesh stats points: 8472097 faces: 24516039 internal faces: 24338367 cells: 8025096 faces per cell: 6.0877 boundary patches: 3 point zones: 0 face zones: 1 cell zones: 1 Overall number of cells of each type: hexahedra: 7790546 prisms: 5053 wedges: 0 pyramids: 0 tet wedges: 53 tetrahedra: 2 polyhedra: 229442 Breakdown of polyhedra by number of faces: faces number of cells 4 2185 5 5133 6 65868 7 184 8 68 9 96772 10 6 11 2 12 35489 13 1 14 5 15 23301 18 428 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 wall 20322 21096 ok (non-closed singly connected) impeller 139105 144658 ok (closed singly connected) simmetry 18245 18883 ok (non-closed singly connected) Checking geometry... Overall domain bounding box (-5.00012 -5.75081 -4.15041) (5 5.75081 5.85) Mesh has 3 geometric (non-empty/wedge) directions (1 1 1) Mesh has 3 solution (non-empty) directions (1 1 1) Boundary openness (-5.36511e-16 -1.45746e-16 -2.70403e-17) OK. Max cell openness = 4.33313e-16 OK. Max aspect ratio = 7.73036 OK. Minimum face area = 3.36406e-07. Maximum face area = 0.0604344. Face area magnitudes OK. Min volume = 2.5461e-08. Max volume = 0.0103205. Total volume = 879.703. Cell volumes OK. Mesh non-orthogonality Max: 59.9991 average: 5.3405 Non-orthogonality check OK. Face pyramids OK. ***Max skewness = 9.32017, 11 highly skew faces detected which may impair the quality of the results <<Writing 11 skew faces to set skewFaces Coupled point location match (average 0) OK. Failed 1 mesh checks. End |
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