The Thermal Re-Emisison feature diffusely reflects particles from a boundary, like the Wall with the Diffuse scattering wall condition. Unlike the Diffuse scattering condition, however, the Thermal Re-Emission feature also re-samples the particle speed from a distribution based on the temperature of the boundary.

Enter the Temperature T (SI unit: K). If the temperature is computed by another physics interface then it can be selected from the list.

Enter a value or expression for the Freezing probability γ (dimensionless). The default is 0. This is the probability (a number from 0 to 1) that a particle will be absorbed by the wall and won’t be re-emitted. For 0 all particles are reflected into the modeling domain, while for 1 all particles are absorbed.