HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Optical flow focusing: Light-induced destabilization of stable liquid threads

Abstract : Confinement of flowing liquid threads by solid walls makes them stable with respect to the Rayleigh–Plateau instability. We demonstrate here that light can break this stability, by forcing locally the deformation of the liquid interface through thermally-induced Marangoni stresses. Depending upon the confining conditions and fluid properties, this optocapillary deformation either pinches or inflates the thread, which may in both cases lead to its localized fragmentation into droplets. In the pinching regime, the laser beam behaves as a wall-free constriction that flow fo-cuses the thread, leading to successive regimes of single and multiple periodicity. Light-driven local Marangoni stresses may prove an elegant contactless alternative to control reversibly the thread-to-droplet transition for digital microfluidics.
Document type :
Journal articles
Complete list of metadata

Cited literature [50 references]  Display  Hide  Download

Contributor : Bernadette Bergeret Connect in order to contact the contributor
Submitted on : Wednesday, September 16, 2015 - 3:44:22 PM
Last modification on : Tuesday, December 21, 2021 - 3:34:04 PM
Long-term archiving on: : Tuesday, December 29, 2015 - 1:35:36 AM


Files produced by the author(s)


Distributed under a Creative Commons Attribution - ShareAlike 4.0 International License



Matthieu Robert de Saint Vincent, Hamza Chraibi, Jean-Pierre Delville. Optical flow focusing: Light-induced destabilization of stable liquid threads. Physical Review Applied, American Physical Society, 2015, 4 (4), pp.044005 (1-8). ⟨10.1103/PhysRevApplied.4.044005⟩. ⟨hal-01198761⟩



Record views


Files downloads