Visualizing Filtered Incoming and Outgoing Radiation

To gain insight into where radiation is originating from, either on input parts or on high-temperature faces, you can use the filtered radiation field functions. You can use these field functions to register radiation to and from specific surfaces. These field functions are available when the View Factors Calculator model is active, that is, when you are performing an S2S Radiation simulation.

To visualize filtered incoming and outgoing radiation:
  1. Create a scalar scene and select the Scenes > [scalar scene] > [scalar displayer] > Parts node, then set Parts to the [Region] > [Boundaries] or Parts > Surfaces on which you want to analyze incoming and outgoing radiation.
  2. Select the [scalar displayer] > Scalar Field node and set Function to one of the following:
    • Radiation > Filtered Incoming Radiation
    • Radiation > Filtered Incoming Radiation on External Side
    • Radiation > Filtered Outgoing Radiation
    • Radiation > Filtered Outgoing Radiation on External Side

    The following screenshot shows the scalar scene of an example geometry.



  3. To specify the filter for the parts participating in the view factor calculation:
    1. Expand the Automation > Field Functions node.
    2. Select one of the following:
      • Filtered Incoming Radiation > Parts
      • Filtered Incoming Radiation on External Side > Parts
      • Filtered Outgoing Radiation > Parts
      • Filtered Outgoing Radiation on External Side > Parts

      and set Parts to the relevant geometry parts for which you want to see incoming or outgoing radiation. The incoming field functions allow you to filter incoming radiation to each of the parts from the selected parts. The outgoing field functions allow you to filter outgoing radiation from the other parts to the selected part.

      For example, if you select the Block geometry:



      The following screenshot shows the filtered incoming radiation scene:



      This scene shows the amount of radiation coming from the Block part onto the sphere and the cylinder. (Incoming radiation is equivalent to irradiation.)

      The following screenshot shows the filtered outgoing radiation with the same Block geometry selected as filter:



      In this scene, you can see how much radiation the sphere and the cylinder are contributing to the block. (Outgoing radiation is equivalent to diffuse radiosity.)

  4. If you want to select faces or patches that match an engineering condition, use a threshold-derived part as input for the filtered radiation field functions.
    For example: To investigate why the cylinder has faces over 400 K, create a threshold part.


    Then use this threshold part in the field functions. The following screenshot shows that the patches with high temperature (the threshold) are receiving their radiation from the side of the block.