activates (>0) or deactivates (=0) the Lagrangian module the different values correspond to the following modellings:
- = 1 Lagrangian two-phase flow in one-way coupling (no influence of the particles on the continuous phase)
- = 2 Lagrangian two-phase flow with two-way coupling (influence of the particles on the dynamics of the continuous phase). Dynamics, temperature and mass may be coupled independently.
- = 3 Lagrangian two-phase flow on frozen continuous phase. This option can only be used in case of a calculation restart. All the Eulerian fields are frozen (including the scalar fields). This option automatically implies iccvfg = 1