File:Pinch-off in two-fluid systems.webm
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Original file (WebM audio/video file, VP8/Vorbis, length 7.5 s, 853 × 480 pixels, 273 kbps overall, file size: 251 KB)
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[edit]DescriptionPinch-off in two-fluid systems.webm |
English: Here are three examples of drops of different fluids detaching from a nozzle. The movie on the left shows the pinch-off of water in air. A distinctive feature in the detachment of a water drop (and of an inviscid liquid in fact) is the pseudo-flattening of the interface of the drop just when it breaks-up. The interface is actually going inside the drop, a phenomenon known as overturning.
The movie in the center shows the pinch-off of pure glycerol, a fluid about 1000 times more viscous than water. The neck that connects the drop to the needle keeps a rather symmetric form until pinch-off. The movie on the right shows the pinch-off of a polymeric fluid ( a water-based solution of a long-chain poly(ethylene-oxide) (PEO)). The PEO solution is known to be a visco-elastic solution, i.e. its behavior can be very close to that of a solid under appropriate stresses. The distinctive feature here is the formation of the thin thread on which the big satellite drop grows. A myriad of these satellite drops can grow, which provides the production of monodisperse drops without further treatment. |
Date | |
Source | Pinch-off in two-fluid systems on YouTube |
Author | Matthieu Roché |
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Pinch-off in two-fluid systems on YouTube, was reviewed on 2 December 2015 by reviewer INeverCry, who confirmed that it was available there under the stated license on that date.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:25, 30 November 2015 | 7.5 s, 853 × 480 (251 KB) | Valhallasw (talk | contribs) | Videoconvert upload from toollabs |
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