Figure 3

Flow measurements around an oil droplet with and without trailing streamers. (A) Sample instantaneous tracer particle velocity (only 0.5% of total \( \sim 3\times {10}^{6}\) vectors are shown). Dot: location of the cell, Arrow: velocity. Mean flow velocity fields around (B) a smooth droplet (Δt = 20 min min) and (C) a droplet with two streamers (Δt = 30 min) superimposed onto their velocity magnitudes (colored contour). Each mean field is averaged over 999 instantaneous realizations. (D) Superimposed streamlines from (B) – black dotted lines and (C) – red solid lines showing the hydrodynamic impact of single or several streamer filaments on flow around a drop. The flow (\(R{e}_{{D}_{d}}=0.4\)) is in the positive x-direction.