In this verification case, two concentric spheres exchange heat due to radiation. The spheres are separated by a non-participating medium and their surfaces are considered to be opaque, gray, and diffuse. The outer sphere is modeled as a boundary with a constant and uniform high temperature of 2000 K and the inner sphere is modeled as a particle with an initial temperature of 300 K. The two spheres are shown in Figure 2.7: Two concentric spheres exchanging heat due to radiation.. For technical details, refer to the documentation for the Thermal Radiation module. This ready-to-use module can be downloaded from the Ansys Customer Portal.
