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Effect of droplet size (10 μl, 20 μl, 50 μl, 100 μl, 200 μl) on the operating diagram. Closed and open symbols represent experimental data for operating boundaries OB1 and OB2, respectively, for the different droplet sizes. The solid lines represent model predictions for OB1. The broken curves refer to predicted OB2 before (dotted) or after (dashed) oil layer fragmentation which has been shown in the inserted video frames. See text for details.
