CHRAIBI, Hamza; WUNENBURGER, Régis; LASSEUX, Didier; PETIT, Julien; DELVILLE, Jean-Pierre

doi:10.1017/jfm.2011.372

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CHRAIBI, Hamza
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

WUNENBURGER, Régis
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

LASSEUX, Didier
Transferts, écoulements, fluides, énergétique [TREFLE]

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Journal of Fluid Mechanics. 2011-10-18, vol. 688, p. 195-218

Cambridge University Press (CUP)

Résumé en anglais

We study flows and interface deformations produced by the scattering of a laser beam propagating through non-absorbing turbid fluids. Light scattering produces a force density resulting from the transfer of linear momentum from the laser to the scatterers. The flow induced in the direction of the beam propagation, called 'optical streaming', is also able to deform the interface separating the two liquid phases and to produce wide humps. The viscous flow taking place in these two liquid layers is solved analytically, in one of the two liquid layers with a stream function formulation, as well as numerically in both fluids using a boundary integral element method. Quantitative comparisons are shown between the numerical and analytical flow patterns. Moreover, we present predictive simulations regarding the effects of the geometry, of the scattering strength and of the viscosities, on both the flow pattern and the deformation of the interface. Finally, theoretical arguments are put forth to explain the robustness of the emergence of secondary flows in a two-layer fluid system.< Réduire

Mots clés en anglais

boundary integral methods

electrohydrodynamic effects

interfacial flows (free surface)

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Eddies and interface deformations induced by optical streaming

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