Technical Paper
A Refined In-Flight Icing Model and its Numerical Implementation
2019-06-10
2019-01-1937
A refined in-flight icing model is proposed whose primary focus lies on an improved prediction of the runback dynamics. The most significant capabilities/properties of the model are: Incorporation of surface tension and wetting effects in the runback model Fully transient treatment of the ice accretion/depletion process and the runback flow Treatment of unsteady heat transfer in the runback layer, the accreted ice layer and the underlying substrate as well as phase transitions solid/liquid in the ice layer Strict mass- and enthalpy-conservative growth/depletion of the ice layer (this is achieved by a specially designed mesh deformation algorithm) An essential part of the paper is devoted to the treatment of surface tension and wetting effects: These effects result from disjoining pressure contributions to the pressure terms in the runback continuity equation, i.e., these effects are inherent properties of the simulated runback dynamics.