Important:  If an initial solution is needed for an unsteady calculation, then you must first switch to the steady-state solver, perform FMG initialization and other necessary iterations to get an initial solution, and then perform unsteady calculations.

Important:  If you are solving for turbulent flow, then you can still use FMG initialization, however, while turbulence equations or any other transport scalars are not solved during the FMG initialization cycles, their values will be updated once after the final FMG sweep on the fine mesh using the latest velocity and pressure fields.