PAT312, Section 65, December 2006 S65-1 Copyright 2007 MSC.Software Corporation SECTION 65 COLLAPSE AND OBSTRUCTION FLAGS

PAT312, Section 65, December 2006 S65-2 Copyright 2007 MSC.Software Corporation

PAT312, Section 65, December 2006 S65-3 Copyright 2007 MSC.Software Corporation NON-OBSTRUCTION FLAG In Viewfactor Boundary Condition, NO-OBSTR FLAG 1 = No obstruction 0 = Potential Obstruction If flag is set, surface will not be checked for obstructing the view between other surfaces in the enclosure Used to reduce execution time for MSC.Thermal Viewfactor Use caution in axisymmetric model

PAT312, Section 65, December 2006 S65-4 Copyright 2007 MSC.Software Corporation NON-OBSTRUCTION FLAG IN R-Z MODELS

PAT312, Section 65, December 2006 S65-5 Copyright 2007 MSC.Software Corporation Resistor Network using COLLAPSE. Surface Nodes Surface Radiosity Node Radiation Resistor Resistor Network without using COLLAPSE COLLAPSE FLAG

PAT312, Section 65, December 2006 S65-6 Copyright 2007 MSC.Software Corporation

PAT312, Section 65, December 2006 S65-7 Copyright 2007 MSC.Software Corporation

PAT312, Section 65, December 2006 S65-8 Copyright 2007 MSC.Software Corporation