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(Introduction) (File Types) (Command Line Interface Mode) (Basic Commands) (Grid Generation and Modification) (Grid Listing and Quality) (Boundary Conditions) (Boundary Condition Checking and Listing) (Graphical User Interface Basics) (Graphical User Interface Reference)

Boundary Condition Checking and Listing

Checking Boundary Conditions

CHECK BOUNDARY|CHECK FRINGE - Check a boundary or fringe

The CHECK command searches the entire file, identifying undefined boundary conditions and non-symmetric coupling, and prints the results on the screen or to a file. There are two possible formats. For regular boundaries, the format is:

   [PAUSE|NOPAUSE] [LINES lines] [ZONE n1 [THRU n2] [bndy]]

and for fringe boundaries, the format is:

   [PAUSE|NOPAUSE] [LINES lines] [ZONE n1 [THRU n2] [bndy]]
   [LABEL label_number|CURRENT|NEXT|ALL]

CKMODE BOUNDARY - Select boundary condition check modes

CKMODE BOUNDARY [ON|OFF] mode1 [mode2 [...]]

The fringe boundary condition check modes have been modified to have the same capabilities as the regular boundary checks. The wall check was modified to also check for coupling to a hole. The singular axis check will run only on fringe boundaries which are index planer. The fringe and regular boundary condition check output format was modified to conform to the new check syntax.

Each mode parameter is one of the following:

    UNDEFINED   Checks for points with undefined boundary conditions.
BOUNDARY   Checks to make sure that all boundary points have valid boundary condition types specified.
COUPLED   Checks to make sure that all coupling pointers reference valid zones, faces, and index ranges.
TRIFACTORS   Checks the distance between a point and its coupled point (calculated by applying the interpolation factors to the adjacent zone).
WALLS   Checks for wall points that may be coupled to another zone face which is not set to wall. (Usually not recommended.)
SINGULAR   Checks to make sure that any points specfies as singular really are singular in at least one direction.
RATIOS   Compares the average area of cells around a point to the area of the cell face to which the point couples. This check looks for potentially unreasonable changes in resolution from zone to zone.
SELF-CLOSING   Checks to make sure that zones with periodic boundary conditions match point-to-point on two opposite (periodic) boundaries.
BL-COUPLED   Looks for wall points of one zone that couple to the interior of a cell in an adjacent zone. Wall points should normally couple to the wall of an adjacent zone unless there is a physical step in the geometry, or the wall ends.

TOLERANCE BOUNDARY - Specify tolerances


    ALL   List the current values of all tolerances.

Listing Boundary Conditions

LIST BOUNDARY|LIST FRINGE - List boundary conditions

The LIST BOUNDARY command allows one to list the boundary conditions. It remembers the values for all of the parameters except bnd_con_type from previous LIST BOUNDARY commands.

There are two possible formats. For regular boundaries, the format is:

   [PAUSE|NOPAUSE] [LINES lines] [ZONE n1 [THRU n2] [bndy]]

and for fringe boundaries, the format is:

   [LINES lines] [LABEL label_number|CURRENT|NEXT|ALL]
   [ZONE n1 [THRU n2] [bndy]] [bnd_con_type]

The bnd_con_type parameter must be one of the following:

    range   All points within the specified range are displayed.
boundary_condition All points of the specified type are displayed.
boundary_condition [POINTS] [IN] range
Only points of the selected type within the specified range are displayed.

The boundary_condition and range parameters are the same as described for the BOUNDARY command.

LIST BOUNDARY REPORT - List a boundary report


List and Check Input/Output Control

The CHECK and LIST commands are also used to check and list grid information. These commands have common input and output modes.

Once a list or check input mode (GRID, BOUNDARY, or FRINGE) has been selected, it will remain selected in all the checking and listing commands until changed. The number of lines per page, pause mode, and output mode are also common between commands. A range of zones to list or check may be specified for BOUNDARY and FRINGE input modes.

    SCREEN|FILE   If FILE is specified then all data will be dumped into the file filename until a new file name is entered or the mode is set to SCREEN. Changing the mode from FILE to SCREEN causes the file filename to be closed. When FILE is specified, the NEW|APPEND|OVERWRITE option may be used when to create a new file, append to an existing file, or overwrite an existing file. If NEW is specified, filename must not be an existing file.
PAUSE|NOPAUSE   Toggle determining whether the output pauses and prompts the user when a page of output has been written.
LINES   Number of lines defining a page of output.
ZONE   Selects the zone or range of zones to list or check.

Last updated 20 Apr 2005