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[snappyHexMesh] Unexpected EOF while reading dictionary entry |
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October 5, 2023, 15:50 |
Unexpected EOF while reading dictionary entry
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#1 |
Member
Mohd Shaeq
Join Date: Aug 2023
Location: Leinfelden-Echterdingen
Posts: 30
Rep Power: 2 |
Hello respected members of the OpenFOAM community,
I am trying to mesh an engine and for that I have modified the snappyHexMeshDict accordingly. But it shows the following error on being run:- Unexpected EOF while reading dictionary entry The snappyHexMeshDict is as follows:- Code:
/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v1912 | | \\ / A nd | Website: www.openfoam.com | | \\/ 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 { Ansaugrohr // STL filename { type triSurfaceMesh; file "Ansaugrohr.stl"; } Auslass // STL filename { type triSurfaceMesh; file "Auslass.stl"; } Basalkruemmer // STL filename { type triSurfaceMesh; file "Basalkruemmer.stl"; } Brennkammerprofil_aeusseres // STL filename { type triSurfaceMesh; file "Brennkammerprofil_aeusseres.stl"; } Brennkammerprofil_inneres // STL filename { type triSurfaceMesh; file "Brennkammerprofil_inneres.stl"; } Duese // STL filename { type triSurfaceMesh; file "Duese.stl"; } Einlass // STL filename { type triSurfaceMesh; file "Einlass.stl"; } InjektorFluidkammer // STL filename { type triSurfaceMesh; file "InjektorFluidkammer.stl"; } InjektorFluidvolumen // STL filename { type triSurfaceMesh; file "InjektorFluidvolumen.stl"; } Nadel // STL filename { type triSurfaceMesh; file "Nadel.stl"; } } /* regions { Ansaugrohr {name Ansaugrohr; } Auslass {name Auslass; } Basalkruemmer {name Basalkruemmer; } Brennkammerprofil_aeusseres {name Brennkammerprofil_aeusseres; } Brennkammerprofil_inneres {name Brennkammerprofil_inneres; } Duese {name Duese; } Einlass {name Einlass; } InjektorFluidkammer {name InjektorFluidkammer; } InjektorFluidvolumen {name InjektorFluidvolumen; } Nadel {name Nadel; } } } Verfeinerungszylinder { type searchableCylinder; // region defined by bounding cylinder point1 (0 0 -0.027) ; // location of the cente at the bottom point2 (0 0 0) ; // location of the center at the top radius 0.0020; // radius of the cylinder } Verfeinerungskasten { type searchableBox; // region defined by bounding box min (-0.075 -0.065 -0.145); max ( 0.065 0.07 -0.004); } */ // Settings for the castellatedMesh generation. castellatedMeshControls //sub-dictionary of controls for castellated mesh. { // 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; //100000; // 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; //1000000; // 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; //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 1; // 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 "Ansaugrohr.eMesh"; level 0; //4; //5; //6 } { file "Auslass.eMesh"; level 6; //4; //5; //6 } { file "Basalkruemmer.eMesh"; level 0; //4; //5; //6 } { file "Brennkammerprofil_aeusseres.eMesh"; level 0; //4; //5; //6 } { file "Brennkammerprofil_inneres.eMesh"; level 6; //4; //5; //6 } { file "Duese.eMesh"; level 1; //4; //5; //6 } { file "Einlass.eMesh"; level 6; //4; //5; //6 } { file "InjektorFluidkammer.eMesh"; level 6; //4; //5; //6 } { file "InjektorFluidvolumen.eMesh"; level 6; //4; //5; //6 } { file "Nadel.eMesh"; level 6; //4; //5; //6 } ); // 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 { Ansaugrohr { // Surface - wise min and max refinement level level (0 0); } Auslass { // Surface - wise min and max refinement level level (6 6); } Basalkruemmer { // Surface - wise min and max refinement level level (0 0); } Brennkammerprofil_aeusseres { // Surface - wise min and max refinement level level (0 0); } Brennkammerprofil_inneres { // Surface - wise min and max refinement level level (6 6); } Duese { // Surface - wise min and max refinement level level (1 1); } Einlass { // Surface - wise min and max refinement level level (6 6); } InjektorFluidkammer { // Surface - wise min and max refinement level level (6 6); } InjektorFluidvolumen { // Surface - wise min and max refinement level level (6 6); } Nadel { // Surface - wise min and max refinement level level (6 6); } /*regions { Ansaugrohr {level (1 1); patchInfo {type wall; }} Auslass {level (6 6); patchInfo {type patch; }} Basalkruemmer {level (1 1); patchInfo {type wall; }} Brennkammerprofil_aeusseres {level (1 1); patchInfo {type wall; } } Brennkammerprofil_inneres {level (6 6); patchInfo {type wall; } } Duese {level (2 2); patchInfo {type wall; }} Einlass {level (6 6); patchInfo {type patch; }} InjektorFluidkammer {level (6 6); patchInfo {type wall; }} InjektorFluidvolumen {level (6 6); patchInfo {type wall; }} Nadel {level (6 6); patchInfo {type wall; }} } */ // 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 { Einlass { mode inside; levels (1 2); } } */ // 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 0 0); // Inside Point // Outside Point (external Mesh)(40 40 55) ; // Inside Point //(0 0 0); // Outside Point (external Mesh) // 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 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 true ; } 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 { Geometrie { 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. // 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 1.7.x! (didn't do anything in 1.7.x) nGrow 0; // Advanced settings // When not to extrude surface. 0 is flat surface, 90 is when two faces // are perpendicular featureAngle 60; // At non-patched 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 1.7.x! 90 degrees corresponds to 130 // in 1.7.x. minMedialAxisAngle 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 { #include "meshQualityDict" maxNonOrtho 65; maxBoundarySkewness 20; maxInternalSkewness 4; maxConcave 80; minVol 1e-18; minTetQuality 1e-9; minArea -1; minTwist 0.05; minDeterminant 0.001; minFaceWeight 0.05; minVolRatio 0.01; minTriangleTwist -1; /* // Optional : some meshing phases allow usage of relaxed rules. // See e.g. addLayersControls::nRelaxedIter. relaxed { //- Maximum non-orthogonality allowed. Set to 180 to disable. maxNonOrtho 75; } // Advanced //- Number of error distribution iterations nSmoothScale 4; //- Amount to scale back displacement at error points errorReduction 0.75; */ // Advanced nSmoothScale 4; errorReduction 0.75; relaxed { maxNonOrtho 55; } //- Number of error distribution iterations nSmoothScale 4; //- Amount to scale back displacement at error points errorReduction 0.75; } // Write flags writeFlags ( scalarLevels // write volScalarField with cellLevel for postprocessing layerSets // write cellSets, faceSets of faces in layer 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 1e-6; // ************************************************************************* // I kindly request you to point out the mistakes I have made or changes that I should make. I would be highly grateful for your kind help. Best regards, Mohd Shaeq |
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October 5, 2023, 18:35 |
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#2 |
Senior Member
Mark Olesen
Join Date: Mar 2009
Location: https://olesenm.github.io/
Posts: 1,689
Rep Power: 40 |
likely one of your c-style comments is not ending where you think it is (eg, a missing terminator).
Your first approach for debugging this is to use a good editor and set as c/c++ mode. Then try to see that all of your open braces/brackets have a corresponding closure. It should also highlight the comments in a different colour, which makes it easier to spot mistakes. If you want to block out a large chunk of input, it can sometimes be useful to stick those sections into separate files and then #include them (or not). Can also use #if 0 / #endif to disable a section of code (I think that works in v1912). Finally, before running snappy and discovering an error, you can also use foamDictionary -expand on the file to verify that the input is indeed what you expected to have. Don't panic, you'll find the problem soon enough! |
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October 6, 2023, 01:59 |
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#3 |
Member
Mohd Shaeq
Join Date: Aug 2023
Location: Leinfelden-Echterdingen
Posts: 30
Rep Power: 2 |
Thank you for your kind assistance, Mark. I had forgotten a closing bracket and by typing it I was able to solve the problem.
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