Another approach to the modelling of turbulent flows, and especially those involving combustion, is the probabilistic method.
This employs a Monte-Carlo technique which enables a probability- density function to be constructed if a sufficiently large number of "particles" is employed.
Although this is not supplied with the current PHOENICS (and perhaps, because of the seeming superiority of MFM, never will be), it should be noted thet a recent paper has been published which shows how the PHOENICS can be used as the basis for Monte-Carlo calculations (Fueyo, Larroya, Valino and Dopazo,1995).
Some remarks similarities and differences between the probabilistic and MFM approaches may be found in the PHENC entry: Multi-Fluid Models of Turbulence.
wbs