SESSOMS, David; BELLOUL, Malika; ENGL, Wilfried; COURBIN, Laurent; PANIZZA, Pascal

doi:10.1103/PHYSREVE.80.016317

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SESSOMS, David
Institut de Physique de Rennes [IPR]
Physics Department [FRIBPHYS]

BELLOUL, Malika
Institut de Physique de Rennes [IPR]

ENGL, Wilfried
Laboratoire du Futur [LOF]
Centre de physique moléculaire optique et hertzienne [CPMOH]

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Physical Review E : Statistical, Nonlinear, and Soft Matter Physics. 2009-07, vol. 80, n° 1, p. 16317

American Physical Society

Résumé en anglais

We present experimental, numerical, and theoretical studies of droplet flows in hydrodynamic networks. Using both millifluidic and microfluidic devices, we study the partitioning of monodisperse droplets in an asymmetric loop. In both cases, we show that droplet traffic results from the hydrodynamic feedback due to the presence of droplets in the outlet channels. We develop a recently-introduced phenomenological model [W. Engl , Phys. Rev. Lett. 95, 208304 (2005)] and successfully confront its predictions to our experimental results. This approach offers a simple way to measure the excess hydrodynamic resistance of a channel filled with droplets. We discuss the traffic behavior and the variations in the corresponding hydrodynamic resistance length Ld and of the droplet mobility β , as a function of droplet interdistance and confinement for channels having circular or rectangular cross sections.< Réduire

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Flows in ducts and channels

Complex fluids and colloidal systems

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Droplet motion in microfluidic networks: Hydrodynamic interactions and pressure-drop measurements

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