Assigning the Continua to the Regions

The simulation has three pre-defined regions—Air, Opaque Components, and Transparent Components. Here, you associate each region with the correct continuum.

To assign the continua to the regions:
  1. For each pre-defined region, select the region node and set Physics Continuum as follows:
    Region Physics Continuum
    Air Air
    Opaque Components Solid Components
    Transparent Components Solid Components
As internal radiation is not relevant in opaque solids, you apply external radiation transfer for the Opaque Components region:
  1. Select the Regions > Opaque Components > Physics Conditions > Radiation Transfer Option node and set Radiation Transfer to External.
For transparent solids, you allow both internal and external radiation:
  1. Select the Regions > Transparent Components > Physics Conditions > Radiation Transfer Option node and set Radiation Transfer to Internal and External.
The surface radiation model relies on the spatial discretization of the boundary surfaces into patches. By default, each boundary face has a patch. To reduce the computational cost for this tutorial, you decrease the patch/face proportion:
  1. Multi-edit the Air, the Opaque Components, and the Transparent Components regions.
  2. In the Multiple Objects dialog, set Physics Values > Patch/Face Proportion > Patch/Face Proportion to 50.0.
  3. Click Close.
  4. Save the simulation .