VFQUERY

VFQUERY, SRCELEM, TARELEM, --, WrOpt
Queries and prints element Hemicube view factors and average view factor.

AUX12: Radiosity Solver

SRCELEM

Elements representing the source radiating surfaces used to query the view factor at the target element(s). If SRCELEM = P, graphical picking is enabled (valid only in the GUI). If SRCELEM = ALL, all selected elements will have their view factors queried. A component name may also be substituted for SRCELEM. Selected elements must be flagged for surface to surface radiation in order to query view factors (SF, SFA, or SFE with Lab = RDSF). The view factors must have been previously computed.

TARELEM

Element for view factor query. If TARELEM = P, graphical picking is enabled (valid only in the GUI). If TARELEM = ALL, all selected elements will have their view factors queried. A component name may also be substituted for TARELEM. Selected elements must be flagged for surface to surface radiation in order to query view factors (SF, SFA, or SFE with Lab = RDSF). The view factors must have been previously computed.

--

Unused field.

WrOpt

Option to write view factors to the output file (Jobname.out).

WON

—

Write view factors to the output file (default).

WOFF

—

Do not write view factors to the output file. This is useful for reducing the size of the output file.

Notes

This is an action command that:

Queries the view factors for the interactions between each selected source element with each selected target element and computes the average view factor.
Writes the view factors for the interactions between each source element with each target element to the output file if WrOpt = WON.

To retrieve the calculated average view factor, issue *GET,Par,RAD,,VFAVG.

If you are only interested in the average view factor, set WrOpt = WOFF, and issue *GET to reduce the size of the output file and save time.

When resuming a database, issue the command VFOPT,READ before issuing the VFQUERY command.

Menu Paths

Main Menu>Radiation Opt>Radiosity Meth>Query