Droplet velocity in microfluidics Hele-Shaw cell: effect of the disjoining pressure

ORAL

Abstract

We present an experimental evidence of the disjoining pressure effect on the traveling velocity of highly confined viscous droplets in microfluidics. Two regimes are observed depending on the capillary number, $Ca=\mu_f U_d/\gamma$. Above a critical capillary number $Ca^*$ the droplet velocity $U_d$ follows $U_d \propto U_f Ca^{1/3}$, where $U_f$ is the velocity of the carrier liquid. However, for $Ca

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Authors

  • Axel Huerre

    • MMN, UMR CNRS 7083, ESPCI ParisTech, 75005 Paris, France

  • Olivier Theodoly

    • LAI, INSERM U600, CNRS UMR 6212, Case 937, 13009 Marseille, France

  • Isabelle Cantat

    • IPR, UMR CNRS 6251, Universite de Rennes 1, 35000 Rennes, France

  • Alexander Leshansky

    • Department of Chemical Engineering, Technion-IIT, Haifa, 32000, Israel

  • Marie-Pierre Valignat

    • LAI, INSERM U600, CNRS UMR 6212, Case 937, 13009 Marseille, France

  • Marie-Caroline Jullien

    • Gulliver, CNRS, ESPCI Paris-Tech, 10 rue Vauquelin, F-75005 Paris, France
    • MMN, UMR CNRS 7083, ESPCI ParisTech, 75005 Paris, France