For advanced applications, it is possible to directly specify the interphase mass transfer sources. On the Fluid Pair Models tab, you may specify the interfacial mass flux or the interfacial mass flow (volumetric mass source) between any pair of phases. The latter is more appropriate for volumetric mass transfer processes such as breakup and collision. For details, see User Defined Interphase Mass Transfer in the CFX-Solver Theory Guide.

You may also specify fluid-specific linearization coefficients for mass flux or flow.