Multiphase flow
Liquid injection, Two phase expansion
-Euler-Lagrangian approach - continuous phase occupies entire domain,
   other phases dispersed in the first one
Common grid; One set of equations for continuous phase; Additional concentration equation for dispersed phase; Energy, mass & momentum sources
                                                                                                                                        
Momentum source
Energy balance for a dispersed phase

Energy source
Mass exchanged between phases
Convective heat flux Heat flux with mass interch.