Modeling VOF with Radiation

You can use radiation and VOF models together in many cases involving solidification, boiling, evaporation, and melting, wherever the effects of radiative heat transfer are significant—for example, the case of glass melting in a furnace.

When you select the VOF model, the Radiation model becomes available in the Optional Models box. If you select Radiation, the Participating Media Radiation (DOM) model is selected automatically if Auto-select is active. If Auto-select is not active, Participating Media Radiation (DOM) becomes available in the Radiation box. In cases where you also want to model the effects of a combusting heat source, such as in a glass furnace, you can also select reacting flow models with the VOF and radiation models. See Combustion and Other Reacting Flows.

After you select the Participating Media Radiation (DOM) model:

  • The Gray Thermal Radiation and Multiband Thermal Radiation models become available.
  • The radiative properties for participating media appear under the Material Properties node of an Eulerian phase if a single component material model is active for that Eulerian phases. For an Eulerian phase with multi-component material models, these radiative properties appear under the Mixture Properties node, not under the Material Properties nodes of the constituent components.
  • These properties can accept constants or field functions as input.
  • Radiation is always treated as a single-phase phenomenon. If the simulation has multiple Eulerian phases, they are treated as a single-phase mixture phase for purposes of radiation, not individually. Radiative properties for the mixture are calculated by mass-fraction weighted radiative properties for each Eulerian phase.
  • The interface between two phases is modeled using the "mushy zone" concept outline by Chan [584]. A "mushy zone" interface is treated as a very thin finite-volume zone of two phases, rather than as a sharp, discontinuous separation between two phases.

  • Radiative properties at boundaries are the same as in all other cases using participating media.
  • All other existing features of Participating Media Radiation (DOM) model, the associated solver, and the post-processing capabilities are unchanged.

Surface to Surface (S2S) and Weighted Sum of Gray Gases (WSGG) radiation models are not available.

See The Participating Media Radiation (DOM) Model, The Gray Thermal Radiation Model, The Multiband Thermal Radiation Model.