| H25E |
October 9, 2014 10:51 |
crash sHM
Hi, I'm trying to mesh a car (porsche 911) with sHM but while it is meshing appears this foam warnings:
Code:
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.1.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : 2.1.1-221db2718bbb
Exec : snappyHexMesh -overwrite
Date : Oct 08 2014
Time : 18:20:42
Host : "pc"
PID : 5083
Case : /home/hector/Desktop/porsche
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Disallowing user-supplied system call operations
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time
Create mesh for time = 0
Read mesh in = 1.92 s
Overall mesh bounding box : (-1.5 -4 -0.605885) (1.5 2.4 1.2)
Relative tolerance : 1e-06
Absolute matching distance : 7.29529e-06
Reading refinement surfaces.
Read refinement surfaces in = 0.09 s
Reading refinement shells.
Refinement level 4 for all cells inside refinementBox
Read refinement shells in = 0 s
Setting refinement level of surface to be consistent with shells.
Checked shell refinement in = 0 s
Reading features.
Read features in = 0 s
Determining initial surface intersections
-----------------------------------------
Edge intersection testing:
Number of edges : 750976
Number of edges to retest : 750976
Number of intersected edges : 25255
Calculated surface intersections in = 2.05 s
Initial mesh : cells:245760 faces:750976 points:259677
Cells per refinement level:
0 245760
Adding patches for surface regions
----------------------------------
Patch Type Region
----- ---- ------
PTri:
5 wall PTri_patch0
Added patches in = 0.03 s
Selecting decompositionMethod hierarchical
Refinement phase
----------------
--> FOAM Warning :
From function Foam::List<Foam::tetIndices> Foam::polyMeshTetDecomposition::faceTetIndices(const polyMesh&, label, label)
in file meshes/polyMesh/polyMeshTetDecomposition/polyMeshTetDecomposition.C at line 565
No base point for face 237020, 4(81587 81648 89517 89456), produces a valid tet decomposition.
--> FOAM Warning :
From function Foam::List<Foam::tetIndices> Foam::polyMeshTetDecomposition::faceTetIndices(const polyMesh&, label, label)
in file meshes/polyMesh/polyMeshTetDecomposition/polyMeshTetDecomposition.C at line 565
No base point for face 237021, 4(81647 89516 89517 81648), produces a valid tet decomposition.
--> FOAM Warning :
From function Foam::List<Foam::tetIndices> Foam::polyMeshTetDecomposition::faceTetIndices(const polyMesh&, label, label)
in file meshes/polyMesh/polyMeshTetDecomposition/polyMeshTetDecomposition.C at line 565
No base point for face 237022, 4(89455 89456 89517 89516), produces a valid tet decomposition.
--> FOAM Warning :
From function Foam::List<Foam::tetIndices> Foam::polyMeshTetDecomposition::faceTetIndices(const polyMesh&, label, label)
in file meshes/polyMesh/polyMeshTetDecomposition/polyMeshTetDecomposition.C at line 565
No base point for face 214170, 4(81586 81587 81648 81647), produces a valid tet decomposition.
--> FOAM Warning :
From function Foam::List<Foam::tetIndices> Foam::polyMeshTetDecomposition::faceTetIndices(const polyMesh&, label, label)
in file meshes/polyMesh/polyMeshTetDecomposition/polyMeshTetDecomposition.C at line 565
No base point for face 236842, 4(81586 89455 89456 81587), produces a valid tet decomposition.
--> FOAM Warning :
From function Foam::List<Foam::tetIndices> Foam::polyMeshTetDecomposition::faceTetIndices(const polyMesh&, label, label)
in file meshes/polyMesh/polyMeshTetDecomposition/polyMeshTetDecomposition.C at line 565
No base point for face 237017, 4(81586 81647 89516 89455), produces a valid tet decomposition.
--> FOAM Warning :
From function Foam::List<Foam::tetIndices> Foam::polyMeshTetDecomposition::faceTetIndices(const polyMesh&, label, label)
in file meshes/polyMesh/polyMeshTetDecomposition/polyMeshTetDecomposition.C at line 565
No base point for face 0, 4(1 62 7931 7870), produces a valid tet decomposition.
--> FOAM Warning :
From function Foam::List<Foam::tetIndices> Foam::polyMeshTetDecomposition::faceTetIndices(const polyMesh&, label, label)
in file meshes/polyMesh/polyMeshTetDecomposition/polyMeshTetDecomposition.C at line 565
No base point for face 1, 4(61 7930 7931 62), produces a valid tet decomposition.
etc, etc, etc...
And then, few minutes later appears that crash message
Code:
Point is not inside the mesh or on a face or edge
I tried adding a lot of decimal numbers to the locationInMesh numbers, also i found a post that says that is necessary select the points with negative X in the blockmeshdict but this neither worked. I tried also make a coarser background mesh and modifying the mintetquality number (-1e30, 1e-30, 0 and 1) but I always get the same result.
Could someone give me some help? Thanks
PD: I give you here the block and snappyhexmesh dicts.
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.1.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
convertToMeters 1;
//Bounding Box : (-0.98043 -2.2003 -0.605885) (0.980019 2.26228 0.665978)
vertices
(
(-1.5 2.4 -0.605885)
(1.5 2.4 -0.605885)
(1.5 -4 -0.605885)
(-1.5 -4 -0.605885)
(-1.5 2.4 1.2)
(1.5 2.4 1.2)
(1.5 -4 1.2)
(-1.5 -4 1.2)
);
blocks
(
hex (0 3 7 4 1 2 6 5) (60 128 32) simpleGrading (1 1 1)
);
edges
(
);
boundary
(
frontAndBack
{
type patch;
faces
(
(1 2 6 5)
(0 4 7 3)
);
}
inlet
{
type patch;
faces
(
(2 3 7 6)
);
}
outlet
{
type patch;
faces
(
(0 1 5 4)
);
}
lowerWall
{
type wall;
faces
(
(0 1 2 3)
);
}
upperWall
{
type patch;
faces
(
(4 5 6 7)
);
}
);
// ************************************************************************* //
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.1.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object snappyHexMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Which of the steps to run
castellatedMesh true;
snap true;
addLayers true;
// Geometry. Definition of all surfaces. All surfaces are of class
// searchableSurface.
// Surfaces are used
// - to specify refinement for any mesh cell intersecting it
// - to specify refinement for any mesh cell inside/outside/near
// - to 'snap' the mesh boundary to the surface
geometry
{
PTri.stl
{
type triSurfaceMesh;
name PTri;
}
refinementBox
{
type searchableBox;
min (-1.2 -3 -0.505885);
max (1.2 2.25 0.9);
}
};
// Settings for the castellatedMesh generation.
castellatedMeshControls
{
// Refinement parameters
// ~~~~~~~~~~~~~~~~~~~~~
// If local number of cells is >= maxLocalCells on any processor
// switches from from refinement followed by balancing
// (current method) to (weighted) balancing before refinement.
maxLocalCells 1000000;
// Overall cell limit (approximately). Refinement will stop immediately
// upon reaching this number so a refinement level might not complete.
// Note that this is the number of cells before removing the part which
// is not 'visible' from the keepPoint. The final number of cells might
// actually be a lot less.
maxGlobalCells 20000000;
// The surface refinement loop might spend lots of iterations refining just a
// few cells. This setting will cause refinement to stop if <= minimumRefine
// are selected for refinement. Note: it will at least do one iteration
// (unless the number of cells to refine is 0)
minRefinementCells 10;
// Allow a certain level of imbalance during refining
// (since balancing is quite expensive)
// Expressed as fraction of perfect balance (= overall number of cells /
// nProcs). 0=balance always.
maxLoadUnbalance 0.10;
// Number of buffer layers between different levels.
// 1 means normal 2:1 refinement restriction, larger means slower
// refinement.
nCellsBetweenLevels 3;
// Explicit feature edge refinement
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Specifies a level for any cell intersected by its edges.
// This is a featureEdgeMesh, read from constant/triSurface for now.
features
(
//{
// file "someLine.eMesh";
// level 2;
//}
);
// Surface based refinement
// ~~~~~~~~~~~~~~~~~~~~~~~~
// Specifies two levels for every surface. The first is the minimum level,
// every cell intersecting a surface gets refined up to the minimum level.
// The second level is the maximum level. Cells that 'see' multiple
// intersections where the intersections make an
// angle > resolveFeatureAngle get refined up to the maximum level.
refinementSurfaces
{
PTri
{
// Surface-wise min and max refinement level
level (5 6);
}
}
// Resolve sharp angles
resolveFeatureAngle 30;
// Region-wise refinement
// ~~~~~~~~~~~~~~~~~~~~~~
// Specifies refinement level for cells in relation to a surface. One of
// three modes
// - distance. 'levels' specifies per distance to the surface the
// wanted refinement level. The distances need to be specified in
// descending order.
// - inside. 'levels' is only one entry and only the level is used. All
// cells inside the surface get refined up to the level. The surface
// needs to be closed for this to be possible.
// - outside. Same but cells outside.
refinementRegions
{
refinementBox
{
mode inside;
levels ((1E15 4));
}
}
// Mesh selection
// ~~~~~~~~~~~~~~
// After refinement patches get added for all refinementSurfaces and
// all cells intersecting the surfaces get put into these patches. The
// section reachable from the locationInMesh is kept.
// NOTE: This point should never be on a face, always inside a cell, even
// after refinement.
locationInMesh (0.01000012312 0.910283903124 0.89749817401238);
// Whether any faceZones (as specified in the refinementSurfaces)
// are only on the boundary of corresponding cellZones or also allow
// free-standing zone faces. Not used if there are no faceZones.
allowFreeStandingZoneFaces true;
}
// Settings for the snapping.
snapControls
{
//- Number of patch smoothing iterations before finding correspondence
// to surface
nSmoothPatch 3;
//- Relative distance for points to be attracted by surface feature point
// or edge. True distance is this factor times local
// maximum edge length.
tolerance 4.0;
//- Number of mesh displacement relaxation iterations.
nSolveIter 0;
//- Maximum number of snapping relaxation iterations. Should stop
// before upon reaching a correct mesh.
nRelaxIter 5;
//- Highly experimental and wip: number of feature edge snapping
// iterations. Leave out altogether to disable.
// Do not use here since mesh resolution too low and baffles present
//nFeatureSnapIter 10;
}
// Settings for the layer addition.
addLayersControls
{
// Are the thickness parameters below relative to the undistorted
// size of the refined cell outside layer (true) or absolute sizes (false).
relativeSizes true;
// Per final patch (so not geometry!) the layer information
layers
{
"(lowerWall|PTri).*"
{
nSurfaceLayers 1;
}
}
// Expansion factor for layer mesh
expansionRatio 1.0;
//- Wanted thickness of final added cell layer. If multiple layers
// is the
// thickness of the layer furthest away from the wall.
// Relative to undistorted size of cell outside layer.
// is the thickness of the layer furthest away from the wall.
// See relativeSizes parameter.
finalLayerThickness 0.3;
//- Minimum thickness of cell layer. If for any reason layer
// cannot be above minThickness do not add layer.
// Relative to undistorted size of cell outside layer.
minThickness 0.1;
//- If points get not extruded do nGrow layers of connected faces that are
// also not grown. This helps convergence of the layer addition process
// close to features.
// Note: changed(corrected) w.r.t 17x! (didn't do anything in 17x)
nGrow 0;
// Advanced settings
//- When not to extrude surface. 0 is flat surface, 90 is when two faces
// make straight angle.
featureAngle 30;
//- Maximum number of snapping relaxation iterations. Should stop
// before upon reaching a correct mesh.
nRelaxIter 3;
// Number of smoothing iterations of surface normals
nSmoothSurfaceNormals 1;
// Number of smoothing iterations of interior mesh movement direction
nSmoothNormals 3;
// Smooth layer thickness over surface patches
nSmoothThickness 10;
// Stop layer growth on highly warped cells
maxFaceThicknessRatio 0.5;
// Reduce layer growth where ratio thickness to medial
// distance is large
maxThicknessToMedialRatio 0.3;
// Angle used to pick up medial axis points
// Note: changed(corrected) w.r.t 17x! 90 degrees corresponds to 130 in 17x.
minMedianAxisAngle 90;
// Create buffer region for new layer terminations
nBufferCellsNoExtrude 0;
// Overall max number of layer addition iterations. The mesher will exit
// if it reaches this number of iterations; possibly with an illegal
// mesh.
nLayerIter 50;
}
// Generic mesh quality settings. At any undoable phase these determine
// where to undo.
meshQualityControls
{
//- Maximum non-orthogonality allowed. Set to 180 to disable.
maxNonOrtho 65;
//- Max skewness allowed. Set to <0 to disable.
maxBoundarySkewness 20;
maxInternalSkewness 4;
//- Max concaveness allowed. Is angle (in degrees) below which concavity
// is allowed. 0 is straight face, <0 would be convex face.
// Set to 180 to disable.
maxConcave 80;
//- Minimum pyramid volume. Is absolute volume of cell pyramid.
// Set to a sensible fraction of the smallest cell volume expected.
// Set to very negative number (e.g. -1E30) to disable.
minVol 1e-13;
//- Minimum quality of the tet formed by the face-centre
// and variable base point minimum decomposition triangles and
// the cell centre. This has to be a positive number for tracking
// to work. Set to very negative number (e.g. -1E30) to
// disable.
// <0 = inside out tet,
// 0 = flat tet
// 1 = regular tet
minTetQuality 1e-30;
//- Minimum face area. Set to <0 to disable.
minArea -1;
//- Minimum face twist. Set to <-1 to disable. dot product of face normal
//- and face centre triangles normal
minTwist 0.02;
//- minimum normalised cell determinant
//- 1 = hex, <= 0 = folded or flattened illegal cell
minDeterminant 0.001;
//- minFaceWeight (0 -> 0.5)
minFaceWeight 0.02;
//- minVolRatio (0 -> 1)
minVolRatio 0.01;
//must be >0 for Fluent compatibility
minTriangleTwist -1;
// Advanced
//- Number of error distribution iterations
nSmoothScale 4;
//- amount to scale back displacement at error points
errorReduction 0.75;
}
// Advanced
// Flags for optional output
// 0 : only write final meshes
// 1 : write intermediate meshes
// 2 : write volScalarField with cellLevel for postprocessing
// 4 : write current intersections as .obj files
debug 0;
// Merge tolerance. Is fraction of overall bounding box of initial mesh.
// Note: the write tolerance needs to be higher than this.
mergeTolerance 1e-6;
// ************************************************************************* //
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