1998 Volume 12 Issue 1 Pages 58-66
The purpose of this report is to predict the shape of the droplet on a solid surface through numerical analysis. The shape of the droplet is determined by the equilibrium of the forces of gravity and surface tension. The two-dimensional cylindrical droplet is analyzed numerically by SOLA (solution algorithm)-VOF (volume of fluid) method using the contact angle as the initial condition. The curvature of the droplet surface was calculated from the position of marker particles put on the droplet surface, subsequently, the droplet shape is obtained with high accuracy. The droplet shape on a solid surface predicted by this method is in good agreement with the photograph of the droplet as well as the contact angle. As the inclination angle of solid surface gets larger, both the front side angle and the back side angle of the droplet gradually changed, until finally, the droplet slipped along the slope. The droplet shape could be satisfactorily simulated by use of the SOLA-VOF method.