Multi-Step Ice Accretion Simulation Using the Level-Set Method 2019-01-1955
In this study we present the ice accretion model developed in the Solver NSMB (Navier-Stokes Multi-
block solver) . This ice accretion model uses the capabilities of the Level-Set approach to propose a
quasi transient solution to ice accretion modeling. In a level-set based solver where remeshing is avoided, the number of ice shots can be increased to achieve any required time-scale "A transient simulation".
The geometry is defined implicitly "without an explicit list of points on its boundary" via a characteristic
scalar function. The Level-Set representing the solid is evolved to replicate the evolution of the ice/air
interface. The inside negative valued zone can further be used to solve a heat transfer equation in
the ice. The outside positive valued zone represents the external flow zone. By using chimera overset
mesh techniques we ensure a very fine mesh around the interface to obtain a high quality flow. Such
embedded-grid methods maintain the same representation of the PDEs used to evaluate the air and
droplet flow fields.
International Conference on Icing of Aircraft, Engines, and Structures