Starting with version 2.2.1 (October 1 1996) the multi-fluid model of turbulence has become a PHOENICS option. There exist therefore:-
How the multi-fluid model is activated is best understood by inspection of the MFM Input-file library.
The following features will there be observed:-
Data are transmitted to EARTH by use of the SPEDAT feature. The number of fluids NFLUIDS is set there and also (for the two-dimensional populations used in combustion examples) the values of NFLR and NFLF (the product of which equals NFLUIDS) which represent the sub-divisions in the reactedness and mixture-ratio dimensions.
Variables F1, F2, F3....... F:NFLUIDS: are SOLVEd; and their initial and boundary conditions are set.
The coupling-and-splitting sources are activated by the PATCH(MICROMIX,PHASEM,1,NX,1,NY,1,NZ,1,LSTEP) statements. However. this is a PATCH which (since the issue of PHOENICS 3.5) needs no accompanying COVALs. Its mere existence suffices.