Figure 3. Hydrodynamic streamlines in Taylors electrohydrodynamic drop model.

The model is valid for a silicone drop in castor oil (a). Adopted from ref. 28. This flow, both outside and inside the drop, is observed experimentally (b). Tracing paths are made by following PE beads outside and one particle inside a drop of radius of about 1 mm. Arrows indicate the direction of the flow. The E-field direction is horizontal in the plane of the panels, as indicated by the arrow. For the side view of the internal particle trace (in the direction of the electric field), see Supplementary Fig. S1.