GEOM, K2D, NDIV
Defines the geometry specifications for the radiation
matrix calculation.
K2D
Dimensionality key:
0  | —  | 3-D geometry (default)  | 
1  | —  | 2-D geometry (plane or axisymmetric)  | 
NDIV
Number of divisions in an axisymmetric model.  Used
only with K2D = 1.  Defaults to 0 (2-D
plane).  The 2-D model is internally expanded to a 3-D model based
on the number of divisions specified (6  
 
NDIV  
 90).  For example, 
NDIV of 6 is internally represented by six 60° sections.