WUNENBURGER, Régis; EVESQUE, Pierre; CHABOT, Carole; GARRABOS, Yves; FAUVE, Stéphane; BEYSENS, Daniel

doi:10.1103/PhysRevE.59.5440

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WUNENBURGER, Régis
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

EVESQUE, Pierre
Laboratoire de mécanique des sols, structures et matériaux [MSSMat]

CHABOT, Carole
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Physical Review E. 1999-05, vol. 59, n° 5, p. 5440-5445

American Physical Society (APS)

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We used the liquid-vapor equilibrium of CO2 near its critical point (TC−T=1to150mK) in order to study the stability of an interface between a gas and a liquid having close densities ρL≃ρV when submitted to high frequency f (3–57.5 Hz) horizontal vibrations (of amplitude a from 0.1 to 2.5 mm). Above a given velocity threshold (2πaf)0 we observed a “frozen wave,” corresponding to an interface profile of sinelike shape which is stationary in the reference frame of the vibrated sample cell. By varying the vibration parameters, the surface tension, and the density difference between the two phases via the temperature, it was found that the wavelength and the amplitude of the stationary profile are both increasing functions of the frequency and of the amplitude of the vibration and that they are proportional to the capillary length. Our measurements are consistent with a model of inviscid and incompressible flow averaging the effect of the vibration over a period and leading to a Kelvin-Helmholtz-like instability mechanism due to the relative motion of the two fluids.< Réduire

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Frozen was induced by high frequency horizontal vibrations on a CO2 liquid-gas interface near the critical point

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