Numerical Analysis of the Deformation Process of a Droplet Impinging upon a Wall

This paper describes the numerical analysis of the deformation process of a droplet impinging upon a flat surface. The calculation has been based on the basic equations of the SMAC method in the cylindrical coordinates, under the consideration of the surface tension. When Re, Fr and We numbers were the same, the experimental results were in good agreement with the calculated ones at each nondimensional time. Then the heat transfer model has been constructed for the case of impingement upon the hot wall surface, and basic equations were solved by the energy method, one-dimensional heat conduction method, and two-dimensional heat conduction method. The experimental results of the evaporation lifetime of the droplet agree well with the calculated ones, as shown by the latter two methods. It was quite possible to simulate the temperature profile in the droplet, although the convection flow inside the droplet and the evaporation process were disregarded in the models.