A case study on the dynamic process of water drop impacting on heated wood surface

A preliminary case study of the impact of a water drop of 2.4 mm diameter upon a heated wood surface is presented. The coupled problem of liquid and air flow, and heat transfer via wood surface was predicted by using a VOF-based method. The dynamic process of the water drop impacting the heated wood surface was visualized with a Photron Fastcam high speed video camera. The impact velocities of the drops were varied from 1.71 m/s to 2.81 m/s. The effects of several case parameters, such as wood surface temperature and basic density, liquid surface tension, and drop–wood contact angle were considered and discussed. The results show that an obvious deformation occurs on the hot wood surface, and the maximum non-dimensional rebound height increases as the collision velocity increases. The numerical simulated results agree well with the experiments.