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ecs

NAME

ecs - Code_Saturne preprocessor

SYNOPSIS

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

DESCRIPTION

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

OPTIONS

-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)

-echo-comm [n]

Print headers of sent messages (and n first/last elements if n is given)

-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

-o, -out [<file>]

Redirect terminal output to a file (default file: output.ecs)

-perio, -periodic <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

-ens, -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, -ens, -ensight, -med)

-divide-poly

Activate triangulation of faces with more than 4 edges

-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)

-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, -perio, -periodic)

-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

ENVIRONMENT

ECS_CONT_SUR_FPE

Continue on floating-point error (Linux on x86_32 or x86_64 only).

ECS_DEF_LNG_ARE_MIN

Length under which an edge is considered degenerate (default: 1.e-15).

ECS_FIC_CHRONO

Name of timing output file.

ECS_FIC_MEM

Name of memory operations trace file.

ECS_PRE_IDEAS_IGNORE_SYS_COO

Ignore I-deas coordinate systems.

ECS_RC_MAX_FAC_DEC

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)

SEE ALSO

cs_io_dump(1), cs_partition(1)