PAT312, Section 70, December 2006 S70-1 Copyright 2007 MSC.Software Corporation SECTION 70 VFAC VNEV & VTRA TEMPLATE DETAILS

PAT312, Section 70, December 2006 S70-2 Copyright 2007 MSC.Software Corporation

PAT312, Section 70, December 2006 S70-3 Copyright 2007 MSC.Software Corporation BASIC VFAC TEMPLATE VFAC template is required for any viewfactor analysis Emissivity input via template Collapse flag ON by default Comments start with * * Basic VFAC template VFAC

PAT312, Section 70, December 2006 S70-4 Copyright 2007 MSC.Software Corporation WAVELENGTH DEPENDENT VFAC Wavelength dependent brings up advanced options data input form Uncheck Constant Emissivity to enter EMPID

PAT312, Section 70, December 2006 S70-5 Copyright 2007 MSC.Software Corporation VFAC TEMPLATE The VFAC is entered into a template.dat.apnd file The entry has the form: VFACTIDNBANDS EPSILONTAUEMPIDTMPIDLAMBDA1LAMBDA2KFLAGCOLLAPSE The line starting with EPSILON Must be repeated for each of the nbands for multiple wavebands Once for nbands = 0 (default)

PAT312, Section 70, December 2006 S70-6 Copyright 2007 MSC.Software Corporation VFAC TEMPLATE (Cont.) TIDTemplate ID number (integer) NBANDS Number of wavebands in this template (integer, default = 0) EPSILONSurface emissivity TAUParticipating media transmissivity (KFLAG = 0) or extinction coefficient (KFLAG = 1)

PAT312, Section 70, December 2006 S70-7 Copyright 2007 MSC.Software Corporation VFAC TEMPLATE (Cont.) EMPIDEmissivity material property ID, optional EMPID > 0: Temperature dependent evaluation EMPID < 0: Time dependent evaluation TMPIDTransmissivity material property ID, optional TMPID > 0: Temperature dependent evaluation TMPID < 0: Time dependent evaluation Evaluated as extinction coefficient if KFLAG = 1 LAMBDA1Waveband beginning wavelength (microns) LAMBDA2Waveband ending wavelength (microns) COLLAPSE>1 = collapse radiosity nodes 0 = do not collapse radiosity nodes

PAT312, Section 70, December 2006 S70-8 Copyright 2007 MSC.Software Corporation EXAMPLE VFAC TEMPLATES Basic VFAC template for TID 99 Provides a constant emissivity Collapse flag 1 (ON) by default ******************************************************************************************* *************************Example VFAC Template 1*********************************** *KeywordTIDNBANDS VFAC990 *EPSILONTAUEMPIDTMPIDLAMBDA1LAMBDA2KFLAGCOLLAPSE *******************************************************************************************

PAT312, Section 70, December 2006 S70-9 Copyright 2007 MSC.Software Corporation EXAMPLE VFAC TEMPLATES VFAC template for TID 115 Provides constant emissivity and transmissivity ******************************************************************************************* *************************Example VFAC Template 2*********************************** *KeywordTIDNBANDS VFAC1150 *EPSILONTAUEMPIDTMPIDLAMBDA1LAMBDA2KFLAGCOLLAPSE *******************************************************************************************

PAT312, Section 70, December 2006 S70-10 Copyright 2007 MSC.Software Corporation EXAMPLE VFAC TEMPLATES VFAC template for TID 117 Provides constant emissivity Provides temperature dependent transmissivity MPID ******************************************************************************************* *************************Example VFAC Template 3*********************************** *KeywordTIDNBANDS VFAC1170 *EPSILONTAUEMPIDTMPIDLAMBDA1LAMBDA2KFLAGCOLLAPSE *******************************************************************************************

PAT312, Section 70, December 2006 S70-11 Copyright 2007 MSC.Software Corporation EXAMPLE VFAC TEMPLATES VFAC template for TID 1098 Provides temperature dependent emissivity MPID Provides temperature dependent transmissivity MPID ******************************************************************************************* *************************Example VFAC Template 4*********************************** *KeywordTIDNBANDS VFAC10980 *EPSILONTAUEMPIDTMPIDLAMBDA1LAMBDA2KFLAGCOLLAPSE *******************************************************************************************

PAT312, Section 70, December 2006 S70-12 Copyright 2007 MSC.Software Corporation EXAMPLE VFAC TEMPLATES VFAC template for TID 897 Provides temperature dependent emissivity MPID Provides temperature dependent extinction coefficient MPID ******************************************************************************************* *************************Example VFAC Template 5*********************************** *KeywordTIDNBANDS VFAC8970 *EPSILONTAUEMPIDTMPIDLAMBDA1LAMBDA2KFLAGCOLLAPSE *******************************************************************************************

PAT312, Section 70, December 2006 S70-13 Copyright 2007 MSC.Software Corporation EXAMPLE VFAC TEMPLATES VFAC template for TID 904 Provides temperature dependent emissivity MPID Provides time dependent transmissivity MPID ******************************************************************************************* *************************Example VFAC Template 6*********************************** *KeywordTIDNBANDS VFAC9040 *EPSILONTAUEMPIDTMPIDLAMBDA1LAMBDA2KFLAGCOLLAPSE *******************************************************************************************

PAT312, Section 70, December 2006 S70-14 Copyright 2007 MSC.Software Corporation EXAMPLE VFAC TEMPLATES VFAC template for TID 925 Provides various data for 3 wavebands ******************************************************************************************* *************************Example VFAC Template 7*********************************** *KeywordTIDNBANDS VFAC9253 *EPSILONTAUEMPIDTMPIDLAMBDA1LAMBDA2KFLAGCOLLAPSE E601 *******************************************************************************************

PAT312, Section 70, December 2006 S70-15 Copyright 2007 MSC.Software Corporation VNEV & VTRA TEMPLATE INPUT Input control block data for TRASYS or NEVADA Absorptivity Emissivity Transmissivity Reflectivity Index of refraction

PAT312, Section 70, December 2006 S70-16 Copyright 2007 MSC.Software Corporation EXAMPLE VNEV & VTRA TEMPLATES * VNEV Template VNEV * VTRA Template VTRA