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On the gas kinetics of laser-induced evaporation of metals

B R Finke and G Simon

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Irradiation of a metal surface by a high intensity laser beam produces an evaporation jet of metal vapour. The properties of a steady evaporation jet are discussed essentially for the one-dimensional case with an extension to small flow divergences. There are three regimes, e.g. a Knudsen layer adjacent to the metal surface, a condensation regime and a hydrodynamic regime. Estimates of temperature, density, average velocity, degree of condensation and decrease of pressure along the jet are given.


PACS

61.80.Ba Ultraviolet, visible, and infrared radiation effects (including laser radiation)

61.82.Bg Metals and alloys

68.03.Fg Evaporation and condensation of liquids

47.45.-n Rarefied gas dynamics

Subjects

Soft matter, liquids and polymers

Fluid dynamics

Surfaces, interfaces and thin films

Condensed matter: structural, mechanical & thermal

Dates

Issue 1 (14 January 1990)



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