Yes, it is possible for the Eulerian multiphase model. You need either the Population Balance model which is available as add-on module in Fluent or the Interfacial Area Concentration model. The Population Balance model is described in the “ANSYS Fluent Advanced Add-On Modules” manual. You can find details about the Interfacial Area Concentration model in the “ANSYS Fluent Theory Guide, chapter Interfacial Area Concentration” which is located under Mixture Model Theory. You can enable this model for each secondary phase separately.