Prediction and measurement of leaky dielectric drop interactions

The electrohydrodynamic interactions between multiple and dissimilar drops are measured experimentally, and a pairwise electrohydrodynamic theory to describe the drop interactions is presented. The trajectories of three and four interacting drops are shown to be qualitatevly predicted by the theory. Drops with distinct electrical properties exhibit nonreciprocal interactions, and the same drop pair can undergo opposite trajectories with different initial separation distances.