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3.6 Standard utilities
The utilities with the OpenFOAM distribution are in the $FOAM_UTILITIES directory. The names are reasonably descriptive, e.g. ideasToFoam converts mesh data from the format written by I-DEAS to the OpenFOAM format. The descriptions of current utilities distributed with OpenFOAM are given in the following Sections.
3.6.1 Pre-processing
- applyBoundaryLayer
- Apply a simplified boundary-layer model to the velocity and turbulence fields based on the 1/7th power-law.
- boxTurb
- Makes a box of turbulence which conforms to a given energy spectrum and is divergence free.
- changeDictionary
- Utility to change dictionary entries, e.g. can be used to change the patch type in the field and polyMesh/boundary files.
- createExternalCoupledPatchGeometry
- Application to generate the patch geometry (points and faces) for use with the externalCoupled boundary condition.
- dsmcInitialise
- Initialise a case for dsmcFoam by reading the initialisation dictionary system/dsmcInitialise.
- engineSwirl
- Generates a swirling flow for engine calulations.
- faceAgglomerate
- Agglomerate boundary faces using the pairPatchAgglomeration algorithm. It writes a map from the fine to coarse grid.
- foamSetupCHT
- Sets up a multi-region case using template files for material properties, field and system files.
- mapFields
- Maps volume fields from one mesh to another, reading and interpolating all fields present in the time directory of both cases.
- mapFieldsPar
- Maps volume fields from one mesh to another, reading and interpolating all fields present in the time directory of both cases. Parallel and non-parallel cases are handled without the need to reconstruct them first.
- mdInitialise
- Initialises fields for a molecular dynamics (MD) simulation.
- setAtmBoundaryLayer
- Applies atmospheric boundary layer models to the entire domain for case initialisation.
- setFields
- Set values on a selected set of cells/patchfaces through a dictionary.
- setWaves
- Applies wave models to the entire domain for case initialisation using level sets for second-order accuracy.
- viewFactorsGen
- View factors are calculated based on a face agglomeration array (finalAgglom generated by faceAgglomerate utility).
3.6.2 Mesh generation
- blockMesh
- A multi-block mesh generator.
- extrudeMesh
- Extrude mesh from existing patch (by default outwards facing normals; optional flips faces) or from patch read from file.
- extrude2DMesh
- Takes 2D mesh (all faces 2 points only, no front and back faces) and creates a 3D mesh by extruding with specified thickness.
- extrudeToRegionMesh
- Extrude faceZones (internal or boundary faces) or faceSets (boundary faces only) into a separate mesh (as a different region).
- foamyHexMesh
- Conformal Voronoi automatic mesh generator
- foamyQuadMesh
- Conformal-Voronoi 2D extruding automatic mesher with grid or read initial points and point position relaxation with optional ”squarification”.
- snappyHexMesh
- Automatic split hex mesher. Refines and snaps to surface.
3.6.3 Mesh conversion
- ansysToFoam
- Converts an ANSYS input mesh file, exported from I-DEAS, to OpenFOAM format.
- ccm26ToFoam
- Reads CCM files as written by Prostar/ccm using ccm 2.6
- cfx4ToFoam
- Converts a CFX 4 mesh to OpenFOAM format.
- datToFoam
- Reads in a datToFoam mesh file and outputs a points file. Used in conjunction with blockMesh.
- fluent3DMeshToFoam
- Converts a Fluent mesh to OpenFOAM format.
- fluentMeshToFoam
- Converts a Fluent mesh to OpenFOAM format including multiple region and region boundary handling.
- foamMeshToFluent
- Writes out the OpenFOAM mesh in Fluent mesh format.
- foamToStarMesh
- Reads an OpenFOAM mesh and writes a pro-STAR (v4) bnd/cel/vrt format.
- foamToSurface
- Reads an OpenFOAM mesh and writes the boundaries in a surface format.
- gambitToFoam
- Converts a GAMBIT mesh to OpenFOAM format.
- gmshToFoam
- Reads .msh file as written by Gmsh.
- ideasUnvToFoam
- I-Deas unv format mesh conversion.
- kivaToFoam
- Converts a KIVA3v grid to OpenFOAM format.
- mshToFoam
- Converts .msh file generated by the Adventure system.
- netgenNeutralToFoam
- Converts neutral file format as written by Netgen v4.4.
- plot3dToFoam
- Plot3d mesh (ascii/formatted format) converter.
- sammToFoam
- Converts a Star-CD (v3) SAMM mesh to OpenFOAM format.
- star3ToFoam
- Converts a Star-CD (v3) pro-STAR mesh into OpenFOAM format.
- star4ToFoam
- Converts a Star-CD (v4) pro-STAR mesh into OpenFOAM format.
- tetgenToFoam
- Converts .ele and .node and .face files, written by tetgen.
- vtkUnstructuredToFoam
- Converts ascii .vtk (legacy format) file generated by vtk/paraview.
- writeMeshObj
- For mesh debugging: writes mesh as three separate OBJ files which can be viewed with e.g. javaview.
3.6.4 Mesh manipulation
- attachMesh
- Attach topologically detached mesh using prescribed mesh modifiers.
- autoPatch
- Divides external faces into patches based on (user supplied) feature angle.
- checkMesh
- Checks validity of a mesh.
- createBaffles
- Makes internal faces into boundary faces. Does not duplicate points, unlike mergeOrSplitBaffles.
- createNonConformalCouples
- Utility to create non-conformal couples between non-coupled patches.
- createPatch
- Utility to create patches out of selected boundary faces. Faces come either from existing patches or from a faceSet.
- deformedGeom
- Deforms a polyMesh using a displacement field U and a scaling factor supplied as an argument.
- flattenMesh
- Flattens the front and back planes of a 2D cartesian mesh.
- insideCells
- Picks up cells with cell centre ’inside’ of surface. Requires surface to be closed and singly connected.
- mergeBaffles
- Detects faces that share points (baffles) and merges them into internal faces.
- mergeMeshes
- Merges two meshes.
- mirrorMesh
- Mirrors a mesh around a given plane.
- moveMesh
- Mesh motion and topological mesh changes utility.
- objToVTK
- Read obj line (not surface!) file and convert into vtk.
- orientFaceZone
- Corrects orientation of faceZone.
- polyDualMesh
- Calculates the dual of a polyMesh. Adheres to all the feature and patch edges.
- refineMesh
- Utility to refine cells in multiple directions.
- renumberMesh
- Renumbers the cell list in order to reduce the bandwidth, reading and renumbering all fields from all the time directories.
- rotateMesh
- Rotates the mesh and fields from the direction n1 to direction n2.
- setsToZones
- Add pointZones, faceZones or cellZones to the mesh from similar named pointSets, faceSets or cellSets.
- singleCellMesh
- Reads all fields and maps them to a mesh with all internal faces removed (singleCellFvMesh) which gets written to region singleCell.
- splitBaffles
- Detects faces that share points (baffles) and duplicates the points to separate them.
- splitMesh
- Splits mesh by making internal faces external. Uses attachDetach.
- splitMeshRegions
- Splits mesh into multiple regions.
- stitchMesh
- Stitches a mesh.
- subsetMesh
- Selects a section of mesh based on a cellSet.
- topoSet
- Operates on cellSets/faceSets/pointSets through a dictionary.
- transformPoints
- Transforms the mesh points in the polyMesh directory according to the translate, rotate and scale options.
- zipUpMesh
- Reads in a mesh with hanging vertices and zips up the cells to guarantee that all polyhedral cells of valid shape are closed.
3.6.5 Other mesh tools
- autoRefineMesh
- Utility to refine cells near to a surface.
- collapseEdges
- Collapses short edges and combines edges that are in line.
- combinePatchFaces
- Checks for multiple patch faces on same cell and combines them. Multiple patch faces can result from e.g. removal of refined neighbouring cells, leaving 4 exposed faces with same owner.
- modifyMesh
- Manipulates mesh elements.
- PDRMesh
- Mesh and field preparation utility for PDR type simulations.
- refineHexMesh
- Refines a hex mesh by 2x2x2 cell splitting.
- refinementLevel
- Tries to figure out what the refinement level is on refined Cartesian meshes. Run BEFORE snapping.
- refineWallLayer
- Utility to refine cells next to patches.
- removeFaces
- Utility to remove faces (combines cells on both sides).
- selectCells
- Select cells in relation to surface.
- splitCells
- Utility to split cells with flat faces.
3.6.6 Post-processing
- engineCompRatio
- Calculate the geometric compression ratio. Note that if you have valves and/or extra volumes it will not work, since it calculates the volume at BDC and TCD.
- noise
- Utility to perform noise analysis of pressure data using the noiseFFT library.
- particleTracks
- Generates a VTK file of particle tracks for cases that were computed using a tracked-parcel-type cloud.
- pdfPlot
- Generates a graph of a probability distribution function.
- postProcess
- Execute the set of functionObjects specified in the selected dictionary (which defaults to system/controlDict) or on the command-line for the selected set of times on the selected set of fields.
- steadyParticleTracks
- Generates a VTK file of particle tracks for cases that were computed using a steady-state cloud NOTE: case must be re-constructed (if running in parallel) before use
- temporalInterpolate
- Interpolate fields between time-steps e.g. for animation.
3.6.7 Post-processing data converters
- foamDataToFluent
- Translates OpenFOAM data to Fluent format.
- foamToEnsight
- Translates OpenFOAM data to EnSight format.
- foamToEnsightParts
- Translates OpenFOAM data to Ensight format. An Ensight part is created for each cellZone and patch.
- foamToGMV
- Translates foam output to GMV readable files.
- foamToTetDualMesh
- Converts polyMesh results to tetDualMesh.
- foamToVTK
- Legacy VTK file format writer.
- smapToFoam
- Translates a STAR-CD SMAP data file into OpenFOAM field format.
3.6.8 Surface mesh (e.g. OBJ/STL) tools
- surfaceAdd
- Add two surfaces. Does geometric merge on points. Does not check for overlapping/intersecting triangles.
- surfaceAutoPatch
- Patches surface according to feature angle. Like autoPatch.
- surfaceBooleanFeatures
- Generates the extendedFeatureEdgeMesh for the interface between a boolean operation on two surfaces. Assumes that the orientation of the surfaces is correct.
- surfaceCheck
- Checks geometric and topological quality of a surface.
- surfaceClean
- Removes baffles - collapses small edges, removing triangles. - converts sliver triangles into split edges by projecting point onto base of triangle.
- surfaceCoarsen
- Surface coarsening using bunnylod:
- surfaceConvert
- Converts from one surface mesh format to another.
- surfaceFeatureConvert
- Convert between edgeMesh formats.
- surfaceFeatures
- Identifies features in a surface geometry and writes them to file, based on control parameters specified by the user.
- surfaceFind
- Finds nearest face and vertex.
- surfaceHookUp
- Find close open edges and stitches the surface along them
- surfaceInertia
- Calculates the inertia tensor, principal axes and moments of a command line specified triSurface. Inertia can either be of the solid body or of a thin shell.
- surfaceLambdaMuSmooth
- Smooths a surface using lambda/mu smoothing.
- surfaceMeshConvert
- Converts between surface formats with optional scaling or transformations (rotate/translate) on a coordinateSystem.
- surfaceMeshConvertTesting
- Converts from one surface mesh format to another, but primarily used for testing functionality.
- surfaceMeshExport
- Export from surfMesh to various third-party surface formats with optional scaling or transformations (rotate/translate) on a coordinateSystem.
- surfaceMeshImport
- Import from various third-party surface formats into surfMesh with optional scaling or transformations (rotate/translate) on a coordinateSystem.
- surfaceMeshInfo
- Miscellaneous information about surface meshes.
- surfaceMeshTriangulate
- Extracts surface from a polyMesh. Depending on output surface format triangulates faces.
- surfaceOrient
- Set normal consistent with respect to a user provided ‘outside’ point. If the -inside option is used the point is considered inside.
- surfacePointMerge
- Merges points on surface if they are within absolute distance. Since absolute distance use with care!
- surfaceRedistributePar
- (Re)distribution of triSurface. Either takes an undecomposed surface or an already decomposed surface and redistributes it so that each processor has all triangles that overlap its mesh.
- surfaceRefineRedGreen
- Refine by splitting all three edges of triangle (‘red’ refinement). Neighbouring triangles which are not marked for refinement get split in half (‘green’ refinement).
- surfaceSplitByPatch
- Writes regions of triSurface to separate files.
- surfaceSplitByTopology
- Strips any baffle parts of a surface. A baffle region is one which is reached by walking from an open edge, and stopping when a multiply connected edge is reached.
- surfaceSplitNonManifolds
- Takes multiply connected surface and tries to split surface at multiply connected edges by duplicating points. Introduces concept of - borderEdge. Edge with 4 faces connected to it. - borderPoint. Point connected to exactly 2 borderEdges. - borderLine. Connected list of borderEdges.
- surfaceSubset
- A surface analysis tool which sub-sets the triSurface to choose only a part of interest. Based on subsetMesh.
- surfaceToPatch
- Reads surface and applies surface regioning to a mesh. Uses boundaryMesh to do the hard work.
- surfaceTransformPoints
- Transform (scale/rotate) a surface. Like transformPoints but for surfaces.
3.6.9 Parallel processing
- decomposePar
- Automatically decomposes a mesh and fields of a case for parallel execution of OpenFOAM.
- reconstructPar
- Reconstructs fields of a case that is decomposed for parallel execution of OpenFOAM.
- reconstructParMesh
- Reconstructs a mesh using geometric information only.
- redistributePar
- Redistributes existing decomposed mesh and fields according to the current settings in the decomposeParDict file.
3.6.10 Thermophysical-related utilities
- adiabaticFlameT
- Calculates the adiabatic flame temperature for a given fuel over a range of unburnt temperatures and equivalence ratios.
- chemkinToFoam
- Converts CHEMKINIII thermodynamics and reaction data files into OpenFOAM format.
- equilibriumCO
- Calculates the equilibrium level of carbon monoxide.
- equilibriumFlameT
- Calculates the equilibrium flame temperature for a given fuel and pressure for a range of unburnt gas temperatures and equivalence ratios; the effects of dissociation on O2, H2O and CO2 are included.
- mixtureAdiabaticFlameT
- Calculates the adiabatic flame temperature for a given mixture at a given temperature.
3.6.11 Miscellaneous utilities
- foamDictionary
- Interrogates and manipulates dictionaries.
- foamFormatConvert
- Converts all IOobjects associated with a case into the format specified in the controlDict.
- foamListTimes
- List times using timeSelector.
- patchSummary
- Writes fields and boundary condition info for each patch at each requested time instance.
OpenFOAM v10 User Guide - 3.6 Standard utilities