VFDI
VFDI, Opt,
ENCLOSURE, DIAGTYPE,
REALDATA1, REALDATA2
Specifies view factor diagnostic options.
-
Opt Diagnostic option:
0
—
Do not write diagnostic information (default).
1
—
Write diagnostic information to the database file Jobname.db.
2
—
Write diagnostic information to a separate view factor diagnosis file Jobname.vfd.
3
—
Combine options 1 and 2 so that diagnostic information is written in both the Jobname.db and the Jobname.vfd files.
STAT
—
Print all specfied values for VFDI command arguments (
Opt,ENCLOSURE,DIAGTYPE,REALDATA1,REALDATA2)-
ENCLOSURE Specifies enclosure number to diagnose. (Enclosure number is set using the SF, SFA, SFE, or SFL command with
LAB= RDSF.)0
—
Diagnose all enclosures (default).
>0
—
Enclosure number to diagnose.
-
DIAGTYPE Specifies diagnostic type.
1
—
View factor sum diagnostic. Creates an element component to be written to Jobname.db and/or Jobname.vfd for rows that have a view factor sum equal to a value that is within the minimum and maximum view factor sum specified by
REALDATA1andREALDATA2, respectively. If the sum is outside of this range, nothing is written. The element component name is "_ENCLOS_n", wherenis the enclosure number.-
REALDATA1 For the view factor sum diagnostic (
DIAGTYPE= 1), this specifies the minimum view factor sum (default = -0.01).-
REALDATA2 For the view factor sum diagnostic (
DIAGTYPE= 1), this specifies the maximum view factor sum (default = 1.1).
Notes
The VFDI command specifies a view factor diagnostic tool that is valid for radiation analyses using the radiosity solver method. It can be used to provide debugging information on the view factor matrix when you must restart an analysis after an unconverged solution. The command writes information to the Jobname.db and/or Jobname.vfd files in the working directory that help identify where view factors in a complex model may be causing a solution failure. For more information, see Troubleshooting with View Factor Diagnostics in the Thermal Analysis Guide.
Issue VFDI to specify diagnostic information to be written the next time view factors are created and written to the database by a subsequent VFOPT,NEW or SOLVE command.