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Leidenfrost Jet

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A water droplet forms an upward jet after impact.

Ultrafast x-ray phase contrast imaging shows the vapor cavity that forms beneath a droplet impacting on a very hot surface. Notice the downward jet at the end.

(a) Diagram of the experimental setup; (b) snapshots of the cavity formation, pinch-off and jet formation; (c) illustration of the impacting drop as a whole.

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Celebrating the physics of all that flows

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