Skip navigation links
(Wind-US Documentation Home Page) (Wind-US User's Guide) (GMAN User's Guide) (MADCAP User's Guide) (CFPOST User's Guide) (Wind-US Utilities) (Common File User's Guide) (Wind-US Installation Guide) (Wind-US Developer's Reference) (Guidelines Documents)

(General Overview) (General Purpose Commands) (File Specification Commands) (Domain Selection Commands) (Variable Selection and Unit Control Commands) (File and Report Generation Commands) (Plotting Commands) (GENPLOT File Format) (rake file Format) (Equations Used by CFPOST)

General Purpose Commands


@ - Invoke a file containing CFPOST commands

@filename

    filename   The name of a file that contains CFPOST commands. All of the commands within the file are executed and then processing resumes with the next command after the @ command. A file that is invoked by an @ command may itself invoke other files with @ commands, but may not invoke any file that is currently being processed by a higher @ command.


boundary layer - Specify method to determine the boundary layer edge

boundary layer edge is percent percent of {uinf|umax|p0inf|h0inf} |
boundary layer edge is percent percent of -
   {deltau|deltaq|deltak|deltauv|deltauw|deltavw} |
boundary layer edge is {p0|T0|y+} of value

The boundary layer command is used to specify how the location of the boundary layer edge is determined when computing the variable delta. Note this is not used for the computation of any other boundary layer thickness variables. The default specification is 99% of umax.

There are three possible methods for determining the boundary layer edge, as follows:

boundary layer edge is percent percent of {uinf|umax|p0inf|h0inf}

With this method, the boundary layer edge is located where the velocity magnitude (or total pressure for p0inf, or total enthalpy for h0inf) first becomes greater than or equal to a percentage of a specified reference value. umax signifies the maximum velocity magnitude on the grid line normal to the surface.

boundary layer edge is percent percent of -
   {deltau|deltaq|deltak|deltauv|deltauw|deltavw}

With this method, the boundary layer edge is located where the percentage difference in velocity (or dynamic pressure, or k of k-ε, or cross flow velocity) magnitude between two adjacent points on the same normal grid line first becomes less than the specified value.

boundary layer edge is {p0|T0|y+} of value

With this method, the boundary layer edge is located where the total pressure, total temperature, or y+ first becomes greater than or equal to the specified value. value must be specified in the currently selected units.

Examples

   boundary layer edge is 99 percent of uinf 
   boundary layer edge is 1 percent of deltau 
   units english inches
   boundary layer edge is p0 of 14.6   ! 14.6 psi


clear - Clear selections

clear [all] [cuts] [rakes] [subsets] [variables] [chemistry]

The clear command removes all selections from the specified lists. The result is that the specified lists are initialized to the same state as they were at the time CFPOST was started.

Note that currently clear all does not clear the chemistry data.

See Also: cut, rake, subset, surface, group, variable, chemistry


exit, quit - Exit from CFPOST

{exit | quit}

The exit or quit command results in the termination of this CFPOST session. Control is returned to the operating system.


first order, second order - Set order for differentiation

[first order | second order]

The first order and second order commands establish the order to be used when differentiating variables in the derivation of Cf, Cfx, Cfy, Cfz, tau, taux, tauy, tauz, and Q. The default value is second order.


orientation - Specify axes orientation

orientation [up [axis] {x|y|z}] [downstream [axis] {x|y|z}]

    up [axis] {x|y|z}   Specifies which of the three coordinate directions represents the "up" direction.

downstream [axis] {x|y|z}   Specifies which of the three coordinate directions represents the "downstream" direction.

The orientation command is used to specify which coordinate direction is up and which is downstream. This information is necessary for computing lift and drag in the integrate force command and for computing the localpha and locbeta variables when requested. If the orientation command is entered without parameters, the current selections are displayed.

See Also: integrate force


show - Show current selections

show [all] [cuts] [rakes] [subsets] [variables] [chemistry]

The show command shows the current variables, chemistry data, subsets, and selections as well as the currently enabled units of measure.

See Also: rake, subset, surface, variable, chemistry


spawn, system - Invoke a subprocess

[spawn [command] | system [command]]

The system and spawn commands allow a user to temporarily suspend operation of CFPOST and invoke one or more operating system commands. If command is specified, the command is executed and control is returned to CFPOST. If command is not specified, the user is left at the operating system prompt and may issue as many operating system commands as desired. Control is returned to CFPOST when the system dependent sub-process termination command is issued (typically exit or logoff).


type - Display the contents of a text file

type filename [lines lines-per-page] [pause | nopause]

    filename   The name of the file to be displayed.

lines lines-per-page   Specifies the number of lines of the listing to be displayed on each screen. This value should be one less than the number of lines on the screen. The default value is 23.

pause | nopause   Specifies whether the program should pause at the end of each screen full of data. The default is to pause at the end of each screen.

The type command displays the contents of the specified file on the screen. This command is useful for viewing the output file from a previous command such as integrate or list. The default extension is .lis if not specified.


Last updated 15 Nov 2011