IJTP HomeIssue Contents

Successive Collision of Two Water Droplets with a Hot Solid
H. Fujimoto, T. Ogihara, S. Yoshimoto, T. Hama and H. Takuda

The deformation behaviour of a pair of coaxially falling droplets impacting onto a hot horizontal solid was studied using two-directional flash photography. The effect of varying the temperature of the solid surface on the collision behaviour of droplets was investigated at relatively low Weber numbers associated with the ratio of the impact inertia to the surface tension force. The hydrodynamics involved in the collision of two droplets is discussed in detail. In addition, the effect of the spacing between the two droplets on the collision mechanics is studied at a high temperature for the solid.

Keywords: Successive collision of droplets, flow visualization, flash photography, Weber number, temperature of solid, boiling, secondary droplets.

full text (IP)