18.7.2 Limitations of FMG Initialization

• FMG initialization is not available for unsteady flows.

  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.

• FMG will not initialize turbulence or other transport equations field variables.

  If your are solving for turbulent flow, then you can still use FMG initialization, however the FMG will not initialize the turbulence field variables. For this reason, a good initial guess of the turbulence field quantities are important for achieving fast convergence after the FMG initialization has been performed.

• FMG should not be used with multiphase flow.