Hybrid version of Two-Fluid-Model in addition to DEM

[wfullmer]

MFIX- Hybrid model

To extend a little with what was mentioned. MFIX is nominally designed for modeling gas-solids flows in whatever framework you use. So, the TFM-TFM is targeted for gas-solids problems, which means that the physical properties, transport properties, interaction terms are describing (by default) gas-solids. Similarly for the TFM-DEM. The hybrid model added the connection between these frameworks, and so by default is for handling gas-solids systems. If you seeking to apply these frameworks to…