The impact spread and solidification of single distilled water droplet of 3.2 mm in diameter at 293 K on a cold plate with temperature below 273 K was studied by both experiment and simulation. The impact heights (100

250

500 mm)

cold plate temperatures (253

268 K)

and cold plate inclined angles (0°

30° and 60°) were assessed for effects on the spreading and solidifying process. The impact process of a pullulan solution droplet at a height of 100 mm on a cold plate at 253 K was simulated and compared to that of a distilled water droplet. The results showed that both impact height and horizontal cold plate temperature played an important role in the droplet spreading process whereas inclined angle of cold plate affected freezing deposition of the droplet. Droplet viscosity affected spreading rate and diameter of freezing deposition. Temperature was not a determinant factor for highly viscose materials. A good alignment between simulation and experimental results indicated that temperature change of the droplet in spreading and freezing process would help to directly explain droplet solidification.