High-speed jetting and spray formation from bubble collapse

A method to create impacting jets at the micrometer length scale by means of a collapsing cavitation bubble is presented. A focused shock wave from a lithotripter leads to the nucleation of a cavitation bubble below a hole of 25 μm diameter etched in a silicon plate. The plate is placed at an air-wa...

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Bibliographic Details
Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2012-01, Vol.85 (1 Pt 2), p.015303-015303, Article 015303
Main Authors: Karri, Badarinath, Avila, Silvestre Roberto Gonzalez, Loke, Yee Chong, O'Shea, Sean J, Klaseboer, Evert, Khoo, Boo Cheong, Ohl, Claus-Dieter
Format: Article
Language:English
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Summary:A method to create impacting jets at the micrometer length scale by means of a collapsing cavitation bubble is presented. A focused shock wave from a lithotripter leads to the nucleation of a cavitation bubble below a hole of 25 μm diameter etched in a silicon plate. The plate is placed at an air-water interface. The expansion and collapse of the bubble leads to two separate jets--an initial slow jet of velocity ∼10 m/s and a later faster jet of velocity ∼50 m/s. The jets subsequently impact coaxially, resulting in a circular sheet of liquid in the plane perpendicular to their axis. The sheet is characterized by a ring of droplets at its rim and breaks up into a spray as the shock pressure is increased. The results demonstrate an approach to create a high-speed jet and fine spray on demand at the micrometer scale.
ISSN:1539-3755
1550-2376
DOI:10.1103/physreve.85.015303