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[snappyHexMesh] sHM layer process keeps getting killed 

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August 11, 2016, 10:21 
sHM layer process keeps getting killed

#1 
Member
Bruno
Join Date: Jun 2016
Location: Siegen, Germany
Posts: 59
Rep Power: 10 
Hi,
I've succesfully completed the external flow research of an aircraft, rotors off, under all conditions I need. Results look meaningful. Wanting now to progress to a rotors on, MRF simulation, I'm having issues with snappyHexMesh and I'm starting to run out of things to try. First I had a very low quality mesh, but after tweaking surface and region refinement variables I got a good snap. I sometimes got a 'Killed' message but changing maxLocalCells and maxGlobalCells fixed that issue. Now, however, I'm stuck at layers. I have tried changing the featureAngle, the amount of layers, the layer thicknesses, maxLocalCells and maxGlobalCells, .. It always results in the following error (full log later) Code:
truncateDisplacement : Unextruded 3 faces due to nonconsecutive vertices being extruded. truncateDisplacement : Unextruded 7 faces due to stringed edges with inconsistent extrusion. truncateDisplacement : Unextruded 0 faces due to nonconsecutive vertices being extruded. truncateDisplacement : Unextruded 0 faces due to stringed edges with inconsistent extrusion. Setting up information for layer truncation ... Killed Below is my snappyHexMeshDict, under that is the full sHM log. Cheers! I hope someone can help me further cause I'm at a bit of a loss. I'm glad I got a good snap, now just have to get the next part. Code:
/** C++ **\  =========    \\ / F ield  OpenFOAM: The Open Source CFD Toolbox   \\ / O peration  Version: 4.0   \\ / 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 { AC.stl { type triSurfaceMesh; name AC; } refinementBody { type searchableBox; min (0.4 0.35 0.15); max ( 0.75 0.35 0.25); } refinementArm1 { type searchableBox; min (0.8 0.1 0.05); max (0.2 0.1 0.15); } refinementArm2 { type searchableBox; min ( 0.1 0.2 0.1); max ( 0.1 0.75 0.1); } refinementArm3 { type searchableBox; min ( 0.25 0.1 0.1); max ( 0.85 0.1 0.1); } refinementArm4 { type searchableBox; min ( 0.1 0.75 0.1); max ( 0.1 0.2 0.1); } gps { type searchableBox; min ( 0.06 0.015 0.145); max ( 0.03 0.015 0.165); } rotor1 { type searchableCylinder; point1 ( 0.65914769291 0 0.06); point2 ( 0.65914769291 0 0.14); radius 0.4; } /*rotor2 { type searchableCylinder; point1 ( 0 0.59384907717 0.04); point2 ( 0 0.59384907717 0.08); radius 0.4; } rotor3 { type searchableCylinder; point1 ( 0 0.59384907717 0.04); point2 ( 0 0.59384907717 0.08); radius 0.4; } rotor4 { type searchableCylinder; point1 ( 0.69501408945 0 0.027); point2 ( 0.69501408945 0 0.067); radius 0.4; }*/ }; // 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 10000000; // 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 "AC.eMesh"; level 4; } ); // 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 { AC { // Surfacewise min and max refinement level level (6 8); // Optional specification of patch type (default is wall). No // constraint types (cyclic, symmetry) etc. are allowed. } } // Resolve sharp angles resolveFeatureAngle 30; // Regionwise 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 { refinementBody { mode inside; levels ((1E15 3)); } refinementArm1 { mode inside; levels ((1E15 3)); } refinementArm2 { mode inside; levels ((1E15 5)); } refinementArm3 { mode inside; levels ((1E15 3)); } refinementArm4 { mode inside; levels ((1E15 3)); } gps { mode inside; levels ((1E15 3)); } rotor1 { mode inside; levels ((1E15 5)); } /*rotor2 { mode inside; levels ((1E15 6)); } rotor3 { mode inside; levels ((1E15 6)); } rotor4 { mode inside; levels ((1E15 6)); }*/ } // 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 (0.39847 0.65104 0.4); // Whether any faceZones (as specified in the refinementSurfaces) // are only on the boundary of corresponding cellZones or also allow // freestanding 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 2.0; // Number of mesh displacement relaxation iterations. nSolveIter 30; // Maximum number of snapping relaxation iterations. Should stop // before upon reaching a correct mesh. nRelaxIter 5; // Feature snapping // Number of feature edge snapping iterations. // Leave out altogether to disable. nFeatureSnapIter 10; // Detect (geometric only) features by sampling the surface // (default=false). implicitFeatureSnap false; // Use castellatedMeshControls::features (default = true) explicitFeatureSnap true; // Detect points on multiple surfaces (only for explicitFeatureSnap) multiRegionFeatureSnap false; } // 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 { AC { nSurfaceLayers 2; } } // 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. // 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 0.01; // 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 1; // Advanced settings // When not to extrude surface. 0 is flat surface, 90 is when two faces // are perpendicular featureAngle 60; // At nonpatched sides allow mesh to slip if extrusion direction makes // angle larger than slipFeatureAngle. slipFeatureAngle 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. // Generic mesh quality settings. At any undoable phase these determine // where to undo. meshQualityControls { // Maximum nonorthogonality 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 projected area v.s. actual area. Set to 1 to disable. minFlatness 0.5; // 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 1e13; minTetQuality 1e30; // 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 // Write flags writeFlags ( scalarLevels layerSets layerFields // write volScalarField for layer coverage ); // Merge tolerance. Is fraction of overall bounding box of initial mesh. // Note: the write tolerance needs to be higher than this. mergeTolerance 1e6; // ************************************************************************* // 

August 11, 2016, 10:23 

#2 
Member
Bruno
Join Date: Jun 2016
Location: Siegen, Germany
Posts: 59
Rep Power: 10 
Just bottom part of the sHM log as it is way to long for this forum..
Code:
Iteration 5 Displacement scaling for error reduction set to 0. Moving mesh using displacement scaling : min:0.237305 max:1 Checking faces in error : nonorthogonality > 65 degrees : 1 faces with face pyramid volume < 1e13 : 73 faces with facedecomposition tet quality < 1e30 : 1381 faces with concavity > 80 degrees : 48 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 178 faces on cells with determinant < 0.001 : 0 Iteration 6 Moving mesh using displacement scaling : min:0 max:1 Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 22 faces with concavity > 80 degrees : 4 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 10 faces on cells with determinant < 0.001 : 0 Iteration 7 Moving mesh using displacement scaling : min:0 max:1 Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 0 faces with concavity > 80 degrees : 0 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 Successfully moved mesh Moved mesh in = 89.85 s Repatching faces according to nearest surface ... Repatched 0 faces in = 2.91 s Edge intersection testing: Number of edges : 7148447 Number of edges to retest : 1652548 Number of intersected edges : 510097 Merging 106791 sets of faces. Edge intersection testing: Number of edges : 7006685 Number of edges to retest : 432992 Number of intersected edges : 368366 Undo iteration 0  Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 74 faces with concavity > 80 degrees : 0 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 2 faces on cells with determinant < 0.001 : 0 Masters that need to be restored:111 Edge intersection testing: Number of edges : 7006818 Number of edges to retest : 708 Number of intersected edges : 368499 Undo iteration 1  Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 0 faces with concavity > 80 degrees : 0 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 Merging all points on surface that  are used by only two boundary faces and  make an angle with a cosine of more than 0.866025. Removing 67916 straight edge points ... Edge intersection testing: Number of edges : 7006818 Number of edges to retest : 357373 Number of intersected edges : 368515 Undo iteration 0  Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 1 faces with facedecomposition tet quality < 1e30 : 6 faces with concavity > 80 degrees : 0 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 Detected 1 error faces on boundaries that have been merged. These will be restored to their original faces. Edge intersection testing: Number of edges : 7006818 Number of edges to retest : 5 Number of intersected edges : 368515 Undo iteration 1  Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 6 faces with concavity > 80 degrees : 0 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 Detected 0 error faces on boundaries that have been merged. These will be restored to their original faces. Detected 6 error faces in mesh. Restoring neighbours of faces in error. Edge intersection testing: Number of edges : 7006818 Number of edges to retest : 262 Number of intersected edges : 368515 Snapped mesh : cells:2169252 faces:7006818 points:2709354 Cells per refinement level: 0 10285 1 2303 2 4998 3 13292 4 37679 5 116446 6 263117 7 411580 8 1309552 Writing mesh to time 2 Wrote mesh in = 141.35 s. Mesh snapped in = 1048.24 s. Shrinking and layer addition phase  Using mesh parameters { maxNonOrtho 65; maxBoundarySkewness 20; maxInternalSkewness 4; maxConcave 80; minFlatness 0.5; minVol 1e13; minTetQuality 1e30; minArea 1; minTwist 0.02; minDeterminant 0.001; minFaceWeight 0.02; minVolRatio 0.01; minTriangleTwist 1; nSmoothScale 4; errorReduction 0.75; } Merging all faces of a cell   which are on the same patch  which make an angle < 60 degrees (cos:0.5)  as long as the resulting face doesn't become concave by more than 90 degrees (0=straight, 180=fully concave) Merging 2185 sets of faces. Edge intersection testing: Number of edges : 7003313 Number of edges to retest : 13443 Number of intersected edges : 365017 Undo iteration 0  Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 212 faces with concavity > 80 degrees : 13 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 3 faces on cells with determinant < 0.001 : 0 Masters that need to be restored:277 Edge intersection testing: Number of edges : 7003654 Number of edges to retest : 1702 Number of intersected edges : 365356 Undo iteration 1  Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 0 faces with concavity > 80 degrees : 0 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 Merging all points on surface that  are used by only two boundary faces and  make an angle with a cosine of more than 0.5. Removing 2313 straight edge points ... Edge intersection testing: Number of edges : 7003654 Number of edges to retest : 17457 Number of intersected edges : 365375 Undo iteration 0  Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 13 faces with concavity > 80 degrees : 2 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 Detected 5 error faces on boundaries that have been merged. These will be restored to their original faces. Edge intersection testing: Number of edges : 7003654 Number of edges to retest : 41 Number of intersected edges : 365375 Undo iteration 1  Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 11 faces with concavity > 80 degrees : 0 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 Detected 0 error faces on boundaries that have been merged. These will be restored to their original faces. Detected 11 error faces in mesh. Restoring neighbours of faces in error. Edge intersection testing: Number of edges : 7003654 Number of edges to retest : 463 Number of intersected edges : 365378 Checking mesh manifoldness ... Checking initial mesh ... Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 0 faces with concavity > 80 degrees : 0 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 Detected 0 illegal faces (concave, zero area or negative cell pyramid volume) Adding in total 0 interprocessor patches to handle extrusion of nonmanifold processor boundaries. Handling points with inconsistent layer specification ... Handling nonmanifold points ... Checking patch manifoldness ... Outside of local patch is multiply connected across edges or points at 0 points. Set displacement to zero for all 0 nonmanifold points Handling feature edges ... Handling cells with warped patch faces ... Set displacement to zero on 98 warped faces since layer would be > 0.5 of the size of the bounding box. Growing nonextrusion points by one layer ... Set displacement to zero for an additional 1001 points. patch faces layers avg thickness[m] nearwall overall      AC 365427 2 0.000497 0.000992 Selecting externalDisplacementMeshMover displacementMedialAxis displacementMedialAxis : Calculating distance to Medial Axis ... displacementMedialAxis : Smoothing normals ... Iteration 0 residual 0.0342433 displacementMedialAxis : Inserting points on patch front if angle to nearest layer patch > 30 degrees. displacementMedialAxis : Inserting points on patch back if angle to nearest layer patch > 30 degrees. displacementMedialAxis : Inserting points on patch inlet if angle to nearest layer patch > 30 degrees. displacementMedialAxis : Inserting points on patch outlet if angle to nearest layer patch > 30 degrees. displacementMedialAxis : Inserting points on patch lowerWall if angle to nearest layer patch > 30 degrees. displacementMedialAxis : Inserting points on patch upperWall if angle to nearest layer patch > 30 degrees. displacementMedialAxis : Smoothing normals in interior ... Iteration 0 residual 0.0667835 Layer addition iteration 0  Determining displacement for added points according to pointNormal ... Detected 1995 points with point normal pointing through faces. Reset displacement at 1995 points to average of surrounding points. displacementMedialAxis : Smoothing using Medial Axis ... displacementMedialAxis : Reducing layer thickness at 40978 nodes where thickness to medial axis distance is large displacementMedialAxis : Removing isolated regions ... displacementMedialAxis : Number of isolated points extrusion stopped : 6864 displacementMedialAxis : Smoothing field ... Iteration 0 residual 5.43147e06 displacementMedialAxis : Moving mesh ... displacementMedialAxis : Iteration 0 Moving mesh using displacement scaling : min:1 max:1 Checking faces in error : nonorthogonality > 65 degrees : 5 faces with face pyramid volume < 1e13 : 12 faces with facedecomposition tet quality < 1e30 : 420 faces with concavity > 80 degrees : 15 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 9 faces on cells with determinant < 0.001 : 0 displacementMedialAxis : Iteration 1 Moving mesh using displacement scaling : min:0.75 max:1 Checking faces in error : nonorthogonality > 65 degrees : 6 faces with face pyramid volume < 1e13 : 6 faces with facedecomposition tet quality < 1e30 : 222 faces with concavity > 80 degrees : 9 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 2 faces on cells with determinant < 0.001 : 0 displacementMedialAxis : Iteration 2 Moving mesh using displacement scaling : min:0.5625 max:1 Checking faces in error : nonorthogonality > 65 degrees : 5 faces with face pyramid volume < 1e13 : 1 faces with facedecomposition tet quality < 1e30 : 143 faces with concavity > 80 degrees : 6 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 displacementMedialAxis : Iteration 3 displacementMedialAxis : Displacement scaling for error reduction set to 0. Moving mesh using displacement scaling : min:0.421875 max:1 Checking faces in error : nonorthogonality > 65 degrees : 3 faces with face pyramid volume < 1e13 : 1 faces with facedecomposition tet quality < 1e30 : 127 faces with concavity > 80 degrees : 3 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 1 faces on cells with determinant < 0.001 : 0 displacementMedialAxis : Iteration 4 Moving mesh using displacement scaling : min:0 max:1 Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 1 faces with facedecomposition tet quality < 1e30 : 16 faces with concavity > 80 degrees : 1 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 displacementMedialAxis : Iteration 5 Moving mesh using displacement scaling : min:0 max:1 Checking faces in error : nonorthogonality > 65 degrees : 0 faces with face pyramid volume < 1e13 : 0 faces with facedecomposition tet quality < 1e30 : 2 faces with concavity > 80 degrees : 0 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.02 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.02 : 0 faces on cells with determinant < 0.001 : 0 displacementMedialAxis : Finished moving mesh ... truncateDisplacement : Unextruded 3 faces due to nonconsecutive vertices being extruded. truncateDisplacement : Unextruded 7 faces due to stringed edges with inconsistent extrusion. truncateDisplacement : Unextruded 0 faces due to nonconsecutive vertices being extruded. truncateDisplacement : Unextruded 0 faces due to stringed edges with inconsistent extrusion. Setting up information for layer truncation ... Killed 

August 11, 2016, 10:26 

#3 
Member
Bruno
Join Date: Jun 2016
Location: Siegen, Germany
Posts: 59
Rep Power: 10 
Figured the checkMesh might be handy as well..
Code:
/**\  =========    \\ / F ield  OpenFOAM: The Open Source CFD Toolbox   \\ / O peration  Version: 4.0   \\ / A nd  Web: www.OpenFOAM.org   \\/ M anipulation   \**/ Build : 4.0665f1db4c1f1 Exec : checkMesh Date : Aug 11 2016 Time : 16:24:21 Host : "brunoVirtualBox" PID : 4849 Case : /home/bruno/OpenFOAM/bruno4.0/run/ACrotors/AC nProcs : 1 sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring runtime modified files using timeStampMaster allowSystemOperations : Allowing usersupplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create polyMesh for time = 1 Time = 1 Mesh stats points: 2812212 faces: 7148447 internal faces: 6635203 cells: 2169252 faces per cell: 6.3541 boundary patches: 7 point zones: 0 face zones: 0 cell zones: 0 Overall number of cells of each type: hexahedra: 1913198 prisms: 0 wedges: 0 pyramids: 0 tet wedges: 0 tetrahedra: 0 polyhedra: 256054 Breakdown of polyhedra by number of faces: faces number of cells 6 78329 8 407 9 120861 10 38 11 133 12 35220 13 5 14 124 15 19887 17 15 18 1032 21 3 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 front 594 646 ok (nonclosed singly connected) back 594 646 ok (nonclosed singly connected) inlet 324 361 ok (nonclosed singly connected) outlet 324 361 ok (nonclosed singly connected) lowerWall 594 646 ok (nonclosed singly connected) upperWall 594 646 ok (nonclosed singly connected) AC 510220 514603 ok (closed singly connected) Checking geometry... Overall domain bounding box (4 3 3) (7 3 3) Mesh has 3 geometric (nonempty/wedge) directions (1 1 1) Mesh has 3 solution (nonempty) directions (1 1 1) Boundary openness (1.40386e17 1.27896e17 2.60202e18) OK. Max cell openness = 2.18586e16 OK. Max aspect ratio = 1.001 OK. Minimum face area = 1.69442e06. Maximum face area = 0.111116. Face area magnitudes OK. Min volume = 2.20614e09. Max volume = 0.0370393. Total volume = 395.961. Cell volumes OK. Mesh nonorthogonality Max: 25.2575 average: 9.8377 Nonorthogonality check OK. Face pyramids OK. Max skewness = 1.00077 OK. Coupled point location match (average 0) OK. Mesh OK. Time = 2 Mesh stats points: 2709354 faces: 7006818 internal faces: 6635203 cells: 2169252 faces per cell: 6.28881 boundary patches: 7 point zones: 0 face zones: 0 cell zones: 0 Overall number of cells of each type: hexahedra: 1807960 prisms: 46256 wedges: 0 pyramids: 0 tet wedges: 208 tetrahedra: 2 polyhedra: 314826 Breakdown of polyhedra by number of faces: faces number of cells 4 34291 5 25244 6 77710 7 253 8 258 9 120682 10 57 11 107 12 35203 13 1 14 116 15 19854 17 15 18 1032 21 3 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 front 594 646 ok (nonclosed singly connected) back 594 646 ok (nonclosed singly connected) inlet 324 361 ok (nonclosed singly connected) outlet 324 361 ok (nonclosed singly connected) lowerWall 594 646 ok (nonclosed singly connected) upperWall 594 646 ok (nonclosed singly connected) AC 368591 411745 ok (closed singly connected) Checking geometry... Overall domain bounding box (4 3 3) (7 3 3) Mesh has 3 geometric (nonempty/wedge) directions (1 1 1) Mesh has 3 solution (nonempty) directions (1 1 1) Boundary openness (3.06106e17 1.16104e17 2.30344e17) OK. Max cell openness = 3.66091e16 OK. Max aspect ratio = 6.43551 OK. Minimum face area = 1.24113e08. Maximum face area = 0.111119. Face area magnitudes OK. Min volume = 1.48059e10. Max volume = 0.0370393. Total volume = 395.962. Cell volumes OK. Mesh nonorthogonality Max: 64.9425 average: 10.8713 Nonorthogonality check OK. Face pyramids OK. ***Max skewness = 5.54032, 7 highly skew faces detected which may impair the quality of the results <<Writing 7 skew faces to set skewFaces Coupled point location match (average 0) OK. Failed 1 mesh checks. End 

August 15, 2016, 03:21 

#5  
Member
Bruno
Join Date: Jun 2016
Location: Siegen, Germany
Posts: 59
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Quote:
Cheers Anton! Say hi to Delft for me. 

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