This chapter describes the multiphase model of FENSAP-ICE-Unsteady that couples the flow, droplets and/or ice equations into a single multiphase code. The coupled flow and droplets equations are solved time-accurate, with ice accretion displacing the mesh and changing the surface conditions as time advances.. The mesh displacement due to icing is incorporated into the Arbitrary Lagrangian Eulerian method which transforms the governing equations on moving and morphing grids. On top of mesh morphing due to iced surface displacement, rigid motion can be prescribed to the entire grid to calculate flows over moving bodies that undergo icing, (i.e. pitching and plunging airfoils).

You are invited to read FENSAP - Flow Solution and ICE3D - Ice Accretion and Water Runback for a description of all input parameters of, respectively, FENSAP, DROP3D and ICE3D. This chapter only highlights input parameters directly related to multiphase flows and that differ from the other solvers.