Abstract
Binary droplet collisions are studied by means of an experimental set-up, which permits one to obtain accurate measurements (within 10% error) of droplet number, sizes and velocities. Ethyl alcohol droplet collisions have been investigated for distinct diameter ratios Δ=1 and Δ=0.5. Different domains of collision outcome are brought out. Transition curves in the literature are compared to the present experimental data. A new theoretical prediction of bouncing is proposed and compared with experimental values. Quantitative measurements of droplet velocities after impact are also obtained. A model to predict droplet velocities for coalescence and bouncing is presented. Droplet sizes and velocities when separation occurs are also given and discussed.
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