Definition Frame of Boundary Nodes Table 14-6: Boundary Physics Nodes for Frames Node Name Definition Frame Boundary Heat Source Material/(Spatial) Continuity on Interior Boundary Spatial Diffuse Surface Spatial Continuity Spatial Heat Flux (Material)/Spatial Outflow N/A Periodic Condition Spatial Symmetry N/A Temperature Spatial Thermal Insulation N/A Thin Layer Material The definition frames of the corresponding pair features are identical to the ones of the standard features.