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. 2013 Jan 2;110(3):853–858. doi: 10.1073/pnas.1209186110

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Fig. 2. — Characterization of the droplet size for one inlet geometry ( μm, μm). (A) Images of oil drops in water for four different slopes, . (B) Measured radii (circles) compared with the predictions of Eq. 1 (solid line) and Eq. 2 (dashed line). (C) Variation of drop radius with the flow rate Q shows a weak dependence; a 1,000-fold increase in Q at most doubles the drop size. The different symbols correspond to different fluid pairs: Oil in water ( mN/m), water in oil ( mN/m), and air in water ( mN/m). The drop size is independent of the fluid properties at low Q.

Inline graphic — Characterization of the droplet size for one inlet geometry ( μm, μm). (A) Images of oil drops in water for four different slopes, . (B) Measured radii (circles) compared with the predictions of Eq. 1 (solid line) and Eq. 2 (dashed line). (C) Variation of drop radius with the flow rate Q shows a weak dependence; a 1,000-fold increase in Q at most doubles the drop size. The different symbols correspond to different fluid pairs: Oil in water ( mN/m), water in oil ( mN/m), and air in water ( mN/m). The drop size is independent of the fluid properties at low Q.