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Rheologica Acta

, Volume 52, Issue 5, pp 403–412 | Cite as

Particles accelerate the detachment of viscous liquids

  • Merlijn S. van Deen
  • Thibault Bertrand
  • Nhung Vu
  • David Quéré
  • Eric Clément
  • Anke Lindner
Original Contribution

Abstract

During detachment of a viscous fluid extruded from a nozzle, a filament linking the droplet to the latter is formed. Under the effect of surface tension, the filament thins until pinch-off and final detachment of the droplet. In this paper, we study the effect of the presence of individual particles trapped in the filament on the detachment dynamics using granular suspensions of small volume fractions (ϕ < 6 %). We show that even a single particle strongly modifies the detachment dynamics. The particle perturbs the thinning of the thread, and a large droplet of fluid around the particle is formed. This perturbation leads to an acceleration of the detachment of the droplet compared to the detachment observed for a pure fluid. We quantify this acceleration for single particles of different sizes and link it to similar observations for suspensions of small volume fractions. Our study also gives more insight into particulate effects on detachment of denser suspensions and allows to explain the accelerated detachment close to final pinch-off observed previously (Bonnoit et al. Phys Fluids 24(4):043304, 2012).

Keywords

Granular suspensions Extensional flow Drop formation 

Notes

Acknowledgements

MvD would like to thank the French embassy in The Netherlands for their funding under the Bourses d’excellence “Descartes” program. We thank Martin van Hecke and Marc Miskin for interesting discussions and P.-B. Bintein for help with the experimental setup.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Merlijn S. van Deen
    • 1
    • 3
  • Thibault Bertrand
    • 1
  • Nhung Vu
    • 1
    • 2
  • David Quéré
    • 1
    • 2
  • Eric Clément
    • 1
  • Anke Lindner
    • 1
  1. 1.PMMH – ESPCIParis Cedex 05France
  2. 2.LadHyxÉcole PolytechniquePalaiseauFrance
  3. 3.Kamerlingh Onnes LabUniversiteit LeidenLeidenThe Netherlands

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