Scattering of liquid droplets from axisymmetric targets

Droplets that glide along a bath of the same fluid are seen to scatter from a cylindrical meniscus analogous to Coulomb scattering of like-charged atomic particles. We define the impact parameter, $b$, as the distance between the tangent line to the initial trajectory of the droplet and the parallel radial line from the center of target. The scattering angle, $\theta$, and the distance of closest approach, $r_{\rm c}$ are measured as functions of $b$. The asymptotic behavior of these values presents as expected for a rapidly decaying potential between the droplet and the target.