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Flow instability of fluid-metal layer generated by laser pulse on an inclined metal surface: Experiments and simulation
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10.1063/1.2710749
/content/aip/journal/apl/90/9/10.1063/1.2710749
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/9/10.1063/1.2710749
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Schematic view of the experiment. (a) Laser irradiation of a Ti sample under . The axis of the coordinate system (not shown) is normal to the target surface and directed away from it, the axis is in the spanwise direction (parallel to the surface), and the axis is directed streamwise and in the target surface. (b) Evolution of parallel -oriented (streamwise) -periodic instabilities in the part of the spot of the fluid layer accelerated by the laser-shock momentum transfer.

Image of FIG. 2.
FIG. 2.

Comparative view of the optical micrographs of surface flow structures in various regions of the spot on very pure Ti, irradiated under , and of numerical simulation. (a) Periphery region (PR); long range -oriented -periodic instabilities.(b) Numerical simulation of the structures in (a) (, , ). (c)Near periphery region (NPR) periodic -oriented instabilities, perturbed by transversal oscillations in the direction. (d) Numerical simulation of the structures in (c) (, , ). (e) Near central region (NCR); intermittent structures. (f) Numerical simulation of structures in (e) (, , ). (g) Central region (CR); chaotic short-range structures. (h) Numerical simulation of chaotic short-range structures in (g) (, , ).

Image of FIG. 3.
FIG. 3.

(Color online) Diagram of perturbation wavelengths and and of the corresponding amplitudes and , of the surface flow instabilities in the PR, NPR, NCR, and CR of the spot. [Subscripts and relate to the long and short wavelengths (amplitudes), respectively.]

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/content/aip/journal/apl/90/9/10.1063/1.2710749
2007-03-01
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Flow instability of fluid-metal layer generated by laser pulse on an inclined metal surface: Experiments and simulation
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/9/10.1063/1.2710749
10.1063/1.2710749
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