High-speed jetting and spray formation from bubble collapse
Karri, B. Avila, S.R.G. Loke, Y.C. O'Shea, S.J. Klaseboer, E. Khoo, B.C. Ohl, C.-D.
Karri, B.
Avila, S.R.G.
Loke, Y.C.
O'Shea, S.J.
Klaseboer, E.
Ohl, C.-D.
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Abstract
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. © 2012 American Physical Society.
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Source Title
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
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Date
2012-01-17
DOI
10.1103/PhysRevE.85.015303
Type
Article