Radiative Heating dialog box (Thermal/SST/ESC/Multiphysics)

Option	Description
Type	Controls the elements that are defined as diffusely radiating heat sources.With Illuminate All Elements, the solver determines which elements are directly illuminated.With Illuminate Selected Elements, you can limit the solver's search for directly illuminated elements. This can save calculation time when some parts of the model have no direct view of the source.
Name	Lets you specify a name for the simulation object. Description opens an editor that lets you type a description for the constraint.
Destination Folder
Simulation Object Container	Specifies the folder in the Simulation Navigator in which the boundary condition will be stored. The list includes the root container and existing folders that you created using the New Folder command. Examples of a root container include Load Container, Constraint Container, and Simulation Object Container.
Folder Manager	Displays a hierarchical listing of existing folders. To create a new folder, right-click any level of the hierarchy and choose New Folder.
Top Side Emitting Region
Group Reference	Lets you apply the top or bottom side emitting region to a group.For more information, see Group Reference options.
Select Object	Lets you select the elements, polygon curves, faces, or edges forming the top or bottom side emitting region.Element Selection Filtering lets you limit your element selection to the FE entity you select from the Filter Type list:0D Elements, 1D Elements, or 2D Elements lets you select only elements of that order.Element Edges lets you select 1D elements, the edges of 2D, or 3D elements.Element Faces lets you select 2D elements or the faces of 3D elements.Caution: You must select Element from the main selection Type Filter list to use the Element Selection Filtering options.Excluded lets you remove individual entities from within your selected object.
Stacked Smart Selector Methods	Opens the Smart Selector Methods dialog box where you can specify a progression of smart selection filters.For more information, see Smart Selector Methods dialog box.
Bottom Side Emitting Region
Select Object	Lets you select the 2D elements or polygon faces forming the bottom side emitting region.Excluded lets you remove individual entities from within your selected object.
Top Side Illuminated Region
Group Reference	Lets you apply the top or bottom side illuminated region to a group.For more information, see Group Reference options.
Select Object	Available if Illuminate Selected Elements type was selected.Lets you select the elements, polygon curves, faces, or edges forming the top side illuminating region.Element Selection Filtering lets you limit your element selection to the FE entity you select from the Filter Type list:0D Elements, 1D Elements, or 2D Elements lets you select only elements of that order.Element Edges lets you select 1D elements, the edges of 2D, or 3D elements.Element Faces lets you select 2D elements or the faces of 3D elements.Caution: You must select Element from the main selection Type Filter list to use the Element Selection Filtering options.Caution: Elements that you select as emitting should not be included as illuminated. Excluded lets you remove individual entities from within your selected object.
Stacked Smart Selector Methods	Opens the Smart Selector Methods dialog box where you can specify a progression of smart selection filters.For more information, see Smart Selector Methods dialog box.
Bottom Side Illuminated Region
Select Object	Available if Illuminate Selected Elements type was selected.Lets you select the 2D elements or polygon faces forming the bottom side illuminating region.Excluded lets you remove individual entities from within your selected object.Caution: Elements that you select as emitting should not be included as illuminated.
Stacked Smart Selector Methods	Opens the Smart Selector Methods dialog box where you can specify a progression of smart selection filters.For more information, see Smart Selector Methods dialog box.
Spectrum
Spectrum	Defines the spectrum of the emitted energy, either Solar, infrared (IR), or Specify Spectral Distribution.
Spectral Distribution Method	Appears only when Specify Spectral Distribution is selected from the Spectrum list. Controls how the emitted energy is calculated.Select Source Temperature if you want to specify the source temperature value for the model. You specify the value in the Source Temperature box.Select Intensity vs Wavelength if you want to specify the intensity of the emitted energy as a function of wavelength. See Specify Field options below.
Magnitude
Heat Load Type	Specifies the method to define the heat load emitted by radiating elements.Total PowerDefines the total power across all radiating elements. Specify its magnitude in the Power Value box.Power per ElementDefines the power for each radiating element. Specify its magnitude in the Power per Element Value box.FluxDefines the radiative power per unit area. Specify its magnitude in the Flux Value box.For more information, see Additional magnitude options.
Direction
Type	Controls the direction of radiated power.Diffuse specifies that the radiative source emits power in all directions, in a diffuse distribution.Collimated specifies that the radiative source emits collimated (parallel) rays. Use Specify Vector to define the direction of the emitted energy.Note: The total energy emitted is not affected by the specified direction of the rays in relation to the emitting surface. However, if the direction you specify is at an oblique angle from the same emitting surface, the energy is more concentrated (narrower beam) than it would be if the specified direction is perpendicular to the same surface (broader beam).
Advanced Options
Calculation Method	Controls how the software calculates radiative heating.Deterministic uses the deterministic view factor method.Monte Carlo uses the Monte Carlo calculation method. See Understanding the Monte Carlo calculation method for more information.
Element Subdivision	Available when Calculation Method is set to Deterministic.Balances view factor accuracy against calculation speed.Fixed granularitySets the granularity of the element subdivision for computing shadowed view factors. Select one of five levels of granularity numbered 0 to 5. A higher subdivision level yields more accurate radiative conductances, but the computation requires additional time. Use GlobalUses the global element subdivision that you specify for the Element Subdivision option on the Radiation Parameters page in the Solver Parameters dialog box.Based on Error CriterionDynamically estimates a subdivision level for each view factor, using the lowest subdivision level that satisfies the criterion. You specify a view factor error tolerance for computing shadowing checks in the Criterion Value box.
Monte Carlo Settings	Available when Calculation Method is set to Monte Carlo.Specifies the Monte Carlo Settings type modeling object that defines the parameters to control the application of the Monte Carlo calculation method in your analysis. Select a modeling object from the list, or click Open Manager to define a new modeling object. For more information, Monte Carlo Settings dialog box (Thermal/SST/ESC/Multiphysics).
Include Faces of Solid Elements	Available when Typethe type is set to Illuminate All Elements.Models radiation from the faces of solid elements.

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Radiative Heating dialog box (Thermal/SST/ESC/Multiphysics), Simcenter 3D 2021.1 Series

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