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Article Dans Une Revue Physical Review Letters Année : 2003

Laser-induced hydrodynamic instability of fluid interfaces

Résumé

We report on a new class of electromagnetically-driven fluid interface instability. Using the optical radiation pressure of a cw laser to bend a very soft near-critical liquid-liquid interface, we show that it becomes unstable for sufficiently large beam power P, leading to the formation of a stationary beam-centered liquid micro-jet. We explore the behavior of the instability onset by tuning the interface softness with temperature and varying the size of the exciting beam. The instability mechanism is experimentally demonstrated. It simply relies on total reflection of light at the deformed interface whose condition provides the universal scaling relation for the onset Ps of the instability.

Dates et versions

hal-00133472 , version 1 (26-02-2007)

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Alexis Casner, Jean-Pierre Delville. Laser-induced hydrodynamic instability of fluid interfaces. Physical Review Letters, 2003, 90, pp.144503. ⟨hal-00133472⟩

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