Ice accretion simulation in supercooled large droplets regime

An Eulerian method that takes into account splashing and rebound effects to numerically simulate ice accretion on airfoils based on structure grid has been proposed. The gas phase is calculated with computational fluid dynamics method, the governing equations of droplet phase are solved based on the velocity of the gas phase to obtain the water collection efficiency on the ice accreting surface. The amount of ice that accretes on the ice accreting surface is calculated by solving the icing model for control volumes along the ice accreting surface, the icing model developed is based on the work of Messinger's. Of special interest in present study is the Supercooled Large Droplets (SLD), the simulation of SLD effects requires specific splashing model and rebound model, the splashing and rebound effects are accounted for by adding source terms into the governing equations of droplet phase. Computational results of present study are compared with predicted and experimental data in the literature, for large droplets the splashing model is a significant improvement compared with the experimental measurements, which indicates that the methods, splashing and rebound model proposed are feasible and effective.