Two-Way Radio User Manual

*
RADIATION VIEWFACTOR
SYMMETRY
Include this parameter to indicate the existence of radiation symmetries in the model. This
parameter must be set equal to the name appearing in the
*
RADIATION SYMMETRY option
where the symm etries are defined. If this parameter is om itted, it is assumed that there are no
radiation symmetries in the cavity.
VTOL
Set this parameter equal to the acceptable tolerance for the viewfactor calculations. If this parameter
is omitted, the default viewfactor tolerance is 0.05.
Optional parameters (for use with the
*
MOTION option):
MDISP
Set this parameter equal to the maximum allowable motion of any node in th e monitored node set
before recalculation of radiation viewfactors. This parameter is relevant only when the
*
MOTION
option appears in conjunction with the
*
RADIATION VIEWFACTOR option. This param eter must
be used with the NSET parameter.
NSET
Set this parameter equal to the name of the node set whose displacements are to be monitored to
decide when geometrical changes are significant enough to trigger recalculation of the radiation
viewfactors during the step. This param eter is relevant only when the
*
MOTION option appears in
conjunction with the
*
RADIATION VIEWFACTOR o ption. This parameter must be used with the
MDISP parameter.
Data lines to define blocking surfaces (BLOCKING=PARTIAL):
First line:
1. List of surfaces that provide blocking inside the cavity, up to eight surfaces per line.
Repeat this data line as often as necess ary to d efine partial blocking.
There are no data lines associated with this option if BLOCKING=PARTIAL is not specified.
17.6–2
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