PAT312, Section 69, December 2006 S69-1 Copyright 2007 MSC.Software Corporation SECTION 69 WAVEBAND DEPENDENCE

PAT312, Section 69, December 2006 S69-2 Copyright 2007 MSC.Software Corporation

PAT312, Section 69, December 2006 S69-3 Copyright 2007 MSC.Software Corporation WAVEBANDS The wavebands associated with each surface in an enclosure must match exactly the wavebands of every other surface in that enclosure For the wavebands associated with two surfaces to be identical means: The number wavebands for each surface must be the same The lower limit of each waveband on each surface must be the same The upper limit of each waveband on each surface must be the same The wavebands for each surface must be input in the same order in the template.dat.apnd file

PAT312, Section 69, December 2006 S69-4 Copyright 2007 MSC.Software Corporation EXAMPLE

PAT312, Section 69, December 2006 S69-5 Copyright 2007 MSC.Software Corporation EXAMPLE

PAT312, Section 69, December 2006 S69-6 Copyright 2007 MSC.Software Corporation EXAMPLE

PAT312, Section 69, December 2006 S69-7 Copyright 2007 MSC.Software Corporation EXAMPLE

PAT312, Section 69, December 2006 S69-8 Copyright 2007 MSC.Software Corporation MODELING SPECTRALLY DEPENDENT PROPERTIES

PAT312, Section 69, December 2006 S69-9 Copyright 2007 MSC.Software Corporation COMPATIBILITY BETWEEN VFAC LOAD/BOUNDARY CONDITIONS AND VFAC TEMPLATE DATA Identical Wavebands in an enclosure Ambient Node is incompatible with KFLAG = 1 Media node not present is incompatible with Constant Transmissivity < 1.0 For every pair of surfaces that see each other, the following must be the same for each surface: MEDNOD, CONSTANT_TAU, TMPID, LAMBDA1, LAMBDA2, AND KFLAG

PAT312, Section 69, December 2006 S69-10 Copyright 2007 MSC.Software Corporation

PAT312, Section 69, December 2006 S69-11 Copyright 2007 MSC.Software Corporation

PAT312, Section 69, December 2006 S69-12 Copyright 2007 MSC.Software Corporation