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Manual Reference Pages  -  CS_PREPROCESS (1)


cs_preprocess - Code_Saturne preprocessor


See Also


cs_preprocess -m <file> [-sc] [options]


Code_Saturne preprocessor reads meshes from several formats. It enables non-conforming joining and periodicity handling, as well as some postprocessing for mesh checking.


-m, --mesh <file> Preprocessor input mesh file (mesh file format determined automatically by filename extension or forced by -format sub-option)
-sc, --sim-comm simulate messages without file output

General options
--cwd <directory> working directory (if different from current directory)
-h, --help Print a usage message and exit.
-i, --in [<file>] Command line completed by a file (default file: standard input)
--int-face [<sub-options>] Count and display interior faces these faces may be selected with face-selection sub-options
-j, --join [<sub-options>] Join non-conforming faces; select faces to join with face-selection sub-options
--log [<file>] Redirect terminal output to a file (default file: preprocessor.log)
-p, --perio <sub-options> Mesh periodicity defined by argument; joining sub-options for tolerances and selection of periodic faces with face-selection sub-options
--reorient If necessary, correct orientation of cells and faces
--version Print version number

Postprocessing options
--case <name> Case name (without this option, the default name is: preprocess)
--cgns [<sub-options>] CGNS geometry output
--ensight [<sub-options>] EnSight Gold geometry output
--med [<sub-options>] MED 2.3 geometry output

Mesh selection sub-options (-m, --mesh)
--format <keyword> Selection of mesh file format
--num <n> Selection of mesh number in file (if the format allows it)
--grp-cel <keyword> Add groups of cells (based on format features/conventions)
* based on sections: keyword "section"
* based on zones: keyword "zone"
--grp-fac <keyword> Add groups of faces (based on format features/conventions)
* based on sections: keyword "section"
* based on zones: keyword "zone"

Available mesh formats (-m, --mesh; --format)

Extension Keyword

CGNS .cgns cgns
pro-STAR/STAR4 .ngeom ngeom
EnSight (6 or Gold) .case ensight
GAMBIT Neutral .neu gambit
GMSH .msh gmsh
NUMECA Hex .hex hex
I-deas universal .unv unv
MED .med med
Simail (NOPO) .des des
Meta-mesh file .mesh meta

Postprocessing selection sub-options (--cgns, --ensight, --med)
--discard-poly discard polygonal faces (wth more than 4 edges) or polyhedra
--simple force mesh output on a single part (EnSight) or section (CGNS)
--text force text output (EnSight)
--big-endian force binary output to big-endian (EnSight)
--color-to-group transform colors to groups (MED)
--volume activate output of volume mesh (by default if -boundary or -info not given)
--boundary activate output of boundary mesh (by default if -volume or -info not given)
--info activate output of information meshes (by default if -volume or -boundary not given)

Periodicity sub-options (-perio, -periodic)
--trans <tx ty tz> translation vector
--rota --angle <alpha> --dir <dx dy dz> [--invpt <px py pz>] rotation defined by an angle (in degrees) and a direction vector, and eventually by an invariant point (origin by default)
--rota --matrix <mij> [--invpt <px py pz>] rotation defined by the rotation matrix (given line by line), and eventually by an invariant point (origin by default)

Non-conformal face joining sub-options (-j, --join, -p, --perio)
--fraction <real number> fraction of the length of the smallest edge under which we consider that vertices may be fused (default value: 0.1)
--plane <real number> minimal cosine of the normals of 2 coplanar faces (default value: 0.8)
--semi-conf fast joining algorithm (allowed if faces already share vertices)

Face selection sub-options (for joining, selection, and periodicity)
--color <number(s)> color numbers of faces to select
--group <name(s)> group names of faces to select
--invsel invert selection


CS_PREPROCESS_MIN_EDGE_LEN Length under which an edge is considered degenerate (default: 1.e-15).
CS_PREPROCESS_MEM_LOG Name of memory operations trace file.
CS_PREPROCESS_IGNORE_IDEAS_COO_SYS Ignore I-deas coordinate systems.
CS_PREPROCESS_JOIN_MAX_SUB_FACES Number of new faces of an initial face above which we consider that conformal joining face reconstruction has gone into an infinite loop (default: 100)


cs_io_dump(1), cs_partition(1)
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CS_PREPROCESS (1) 2009-02-04

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