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Laser drilling into an absorbing liquid (1992)

Mueller, R. E. ; Bird, J. ; Duley, W. W.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 71 (1992), S. 551-556

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: The interaction of continuous CO2 laser radiation with water is described. Tightly focused radiation at powers of up to 120 W is used to generate and maintain a conical depression in the water surface similar to the keyhole created during laser penetration welding. The observed penetration depth of up to 7 mm is explained in terms of a hydrodynamic model and observations on the interaction induced liquid flows are described. The momentum reaction to the flow of steam up out of the keyhole generates a downward flow in the liquid around the keyhole with a velocity of ∼20 cm/s under the conditions of these experiments. The experiment has also been performed under variable gravity conditions provided by the NASA KC-135 Microgravity Aircraft to observe effects associated with changes in hydrostatic pressure and buoyancy on the system.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.350404

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