Déformations et instabilités d'interfaces liquides pilotées par la diffusion d'une onde laser en milieux turbides

Abstract : This thesis work is dedicated to liquid interface deformations from a continuous laser wave. We demonstrate that elastic scattering of the incident wave in turbid medium induces a scattering force density giving birth to permanent bulk flows in the fluid. Near a soft interface, viscous stresses associated to these flows can deform the interface up to instability and produce a liquid jet. In this manuscript, we report an experimental study dedicated to this new light-fluid coupling in combination with numerical simulations. We also study interface deformations and instability induced by radiation pressure, due to refractive index contrast between the two liquid phases in coexistence, in transparent fluids. We finally analyzed the combination of both couplings in turbid media, scattering force and radiation pressure which differently operate for the interface deformation. To do this, we used different turbid and transparent fluids systems, which have the main particularity to present very low interfacial tension.


https://tel.archives-ouvertes.fr/tel-00750211
Contributor : Julien Petit <>
Submitted on : Friday, November 9, 2012 - 11:27:35 AM
Last modification on : Friday, November 9, 2012 - 4:46:06 PM

Identifiers

  • HAL Id : tel-00750211, version 1

Collections

Citation

Julien Petit. Déformations et instabilités d'interfaces liquides pilotées par la diffusion d'une onde laser en milieux turbides. Mechanics of the fluids [physics.class-ph]. Université Sciences et Technologies - Bordeaux I, 2011. French. <tel-00750211>

Export

Share

Metrics

Consultation de
la notice

176

Téléchargement du document

119