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Member
Mahmoud Aboukhedr
Join Date: Feb 2014
Location: London
Posts: 40
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Hii All,
Am new with openfoam and am trying to solve a model using IcoFoam ... the model is quit big one ... but it should be easy solver to start with .... the checkMesh is : Time = 0 Mesh stats points: 1569626 faces: 10443507 internal faces: 9909246 cells: 4643941 faces per cell: 4.38265 boundary patches: 6 point zones: 0 face zones: 0 cell zones: 1 Overall number of cells of each type: hexahedra: 600979 prisms: 76014 wedges: 0 pyramids: 499017 tet wedges: 0 tetrahedra: 3467931 polyhedra: 0 Checking topology... Boundary definition OK. ***Total number of faces on empty patches is not divisible by the number of cells in the mesh. Hence this mesh is not 1D or 2D. 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 backandfront 407433 239569 ok (non-closed singly connected) porous_wall 102427 110305 ok (non-closed singly connected) buttom_wall 8125 8764 ok (non-closed singly connected) inlet_r 4069 4396 ok (non-closed singly connected) inlet_l 4082 4410 ok (non-closed singly connected) outlet 8125 8764 ok (non-closed singly connected) Checking geometry... Overall domain bounding box (-2.5e-05 -1.25e-05 0) (2.5e-05 1.25e-05 1e-06) Mesh (non-empty, non-wedge) directions (1 1 0) Mesh (non-empty) directions (1 1 0) ***Number of edges not aligned with or perpendicular to non-empty directions: 5123085 <<Writing 1427139 points on non-aligned edges to set nonAlignedEdges Boundary openness (-3.08979e-16 -2.22805e-16 -1.58208e-15) OK. Max cell openness = 3.34869e-16 OK. Max aspect ratio = 11.0922 OK. Minimum face area = 3.13132e-16. Maximum face area = 3.13647e-14. Face area magnitudes OK. Min volume = 2.60299e-24. Max volume = 5.5547e-21. Total volume = 7.80113e-16. Cell volumes OK. Mesh non-orthogonality Max: 63.864 average: 18.1601 Non-orthogonality check OK. Face pyramids OK. ***Max skewness = 4.18125, 17278 highly skew faces detected which may impair the quality of the results <<Writing 17278 skew faces to set skewFaces Coupled point location match (average 0) OK. And I used the same icoFoam solver setup for the the elbow tutorial .... the only changes is in the control dict file : application icoFoam; startFrom latestTime; startTime 0; stopAt endTime; endTime 5; deltaT 0.0005; writeControl timeStep; everytime I run icoFoam I get this error :: Create time Create mesh for time = 0 Reading transportProperties Reading field p Reading field U Reading/calculating face flux field phi Starting time loop Time = 0.0005 Courant Number mean: 16.0233 max: 52307.8 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 0.0992917, No Iterations 24 smoothSolver: Solving for Uy, Initial residual = 0, Final residual = 0, No Iterations 0 DICPCG: Solving for p, Initial residual = 1, Final residual = 0.0998527, No Iterations 643 DICPCG: Solving for p, Initial residual = 0.727682, Final residual = 0.0659464, No Iterations 2 time step continuity errors : sum local = 11140.1, global = 3.56008, cumulative = 3.56008 ExecutionTime = 202.81 s ClockTime = 203 s Time = 0.001 Courant Number mean: 64199.9 max: 8.91455e+06 #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::sigFpe::sigHandler(int) at ??:? #2 in "/lib/x86_64-linux-gnu/libc.so.6" #3 Foam::GaussSeidelSmoother::smooth(Foam::word const&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double> const&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, unsigned char, int) at ??:? #4 Foam::GaussSeidelSmoother::smooth(Foam::Field<doub le>&, Foam::Field<double> const&, unsigned char, int) const at ??:? #5 Foam::smoothSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:? #6 at ??:? #7 at ??:? #8 at ??:? #9 at ??:? #10 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #11 at ??:? ^CFloating point exception (core dumped) Can anyone till me what does it mean and how to fix it ??? |
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openfoam 2.1.x |
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