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Droplet diameter d as a function of absolute flow rate Qt for flow-focus drop makers with different nozzle widths, as labeled; the nozzle widths are in units of microns. d represents the diameter of a spherical drop with the same volume than the squashed droplet formed in the device. The flow rate ratio is 0.5. Inset: droplet diameter divided by nozzle height as a function of the capillary number. The data for all drop makers collapse to d∕hαCa0.13.
