A three-dimensional (3-D) icing model was built for the ice accretion on the upwind surfaces of the plane.The methods and steps for solving the model were also presented.The model can simulate both the ice accretion in the glaze ice

rime ice and no ice conditions and the water film flow on the ice surface.The model can also estimate which kind of ice accretion occurs when the super-cooled water droplets impinge on the surfaces.The 3-D ice accretion on airfoil-plane intersecting wall was simulated with the model.The two-dimensional (2-D) section of the 3-D ice on the airfoil was compared with National Aeronautics and Space Administration's (NASA's) ice shape.Good agreement proves the icing model is logical.