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POSTPROC - Create GENPLOT files for assessing convergence (block)

/!POSTPROC [gen_name]
   /!{SETDEF | SET} set_options
   /![{ZONE | ZONES} zone_list]
   /![{PLANE | PLANES} plane_list]
   /![{DIRECTION | DIR} direction]

The POSTPROC keyword block is used in conjunction with the -genpost wind script option and the LOADS keyword to automatically create GENPLOT files containing convergence information during a Wind-US run. After the Wind-US run ends, these files could then be post-processed using CFPOST to graphically assess the progress of the solution toward convergence. The -genpost option specifies how often the files should be updated, and the information in the POSTPROC block specifies what should be written into the files.

Note that every keyword in the POSTPROC block, including the opening and closing keywords, must start with the two characters "/!". If the -genpost option is not used, this keyword block is ignored.

The various elements of the POSTPROC keyword block are defined as follows:

/!POSTPROC [gen_name]

The POSTPROC and ENDPOSTPROC keywords define the beginning and end of the POSTPROC block. Multiple POSTPROC blocks are allowed. The optional gen_name is the name to be used for the GENPLOT file. An extension of .gen is automatically added. The default is Postgen1 for the first POSTPROC block in the .dat file, Postgen2 for the second, etc.

/!{SETDEF | SET} set_options

The SETDEF keyword is required, and defines the quantities to be written into the GENPLOT file. These may be residuals, and/or integrated flowfield values specified using the LOADS keyword block. The values are extracted from the .lis file and written into the GENPLOT file using the utility in batch mode. The input string set_options contains command-line options for that specify the quantities to be extracted. Thus, see the Command-Line Options section of the documentation for the syntax to be used in set_options.

Note that set_options is only used to define the quantities to be extracted (i.e., residuals, loads, etc.) Other options used when is run as a stand-alone utility, such as -list, -plane, -zone, etc., are automatically created by the wind scripts, and should not be specified using the SETDEF keyword.

/!{ZONE | ZONES} zone_list

Extract quantities only for the listed zones. Multiple zones and/or a range of zones may be specified using syntax like "2,3,6-8". The default is all zones.

/!{PLANE | PLANES} plane_list

Extract integrated flowfield quantities only for the listed "planes". The "planes" are actually the surfaces and/or subsets specified using the SURFACE and SUBSET keywords in the LOADS keyword block. Multiple planes and/or a range of planes may be specified using syntax like "2,3,6-8". The default is all planes.

Planes are numbered in the order specified in the Wind-US input data (.dat) file, and are "global", not "zonal". Thus, the ZONE keyword in the POSTPROC block does not apply. For example, imagine a five-zone grid with two SURFACE keywords specified in the LOADS block for each zone, in order. If in the POSTPROC block you specify

   ZONE 3
   PLANES 1,2
you'll be extracting integrated values for the two surfaces in zone 1, not zone 3, since planes 1 and 2 are in zone 1. To extract values for the two surfaces in zone 3, you'd specify
   PLANES 5,6
/!{DIRECTION | DIR} direction

When forces, moments, or momentum fluxes are being extracted, the DIRECTION keyword may be used to specify the desired direction. For details see the description of the -direction command-line option for The default is all applicable directions.


When forces or moments are being extracted, only extract pressure values (when NOVISCOUS is specified) or viscous values (when NOPRESSURE is specified). The default is to extract both pressure and viscous values.

Note that viscous values are only available when VISCOUS is specified in the surface/subset specification in the LOADS keyword block. If it's not, specifying COMPONENT NOVISCOUS in the POSTPROC block will have no effect.

Last updated 7 Mar 2008