The droplet pinch-off from a liquid jet was investigated experimentally. Details of the shape of the thin liquid neck joining the droplet to its parent body were studied in terms of the fluid viscosity and the jet diameter. As the viscosity increased, the neck rapidly elongated creating a long thread. Its final diameter before rupture was approximately one micrometer and seems to be constant within wide range of parameters varied. One or multiple break-ups of the micro-thread were observed, which produced micro-satellites, i.e. droplets in a micrometer range [28,39,40,43,47,49].
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Full breakup history 197um nozzle.
Full breakup history 300um nozzle.
Close-up breakup 197um nozzle.
Very viscous breakup, 197um nozzle.
Very viscous thread, 197um nozzle.
"Big eats small"
Jet from 75um nozzle.
Jet from 197um nozzle.
Jet from 500um nozzle.
Jet from 1300um nozzle.
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