APS Logo

Freezing splashes

ORAL

Abstract

The splashing of impacting drops is a key feature of multiphase flows with important applications from combustion to printing, or disease spreading for instance.

Usually, spreading of the drop is observed at low velocity, and splashing above a threshold velocity that depends on the drop geometry, fluids properties and substrate conditions.

In the present study, we investigate how this splashing velocity evolves for water drops impact on a solid substrate, when varying the substrate temperature. While a small variations are

observed for subtrate temperature above the freezing one of water (0° C), a rapid decrease of the threshold is noticed for sub-freezing substrate temperature. Freezing thus promote splashing!

We will characterize this variation and discuss the new physical mechanisms at play in this splashing regime.

–

Presenters

  • Christophe F Josserand

    CNRS, Ecole Polytechnique, Laboratoire d'Hydrodynamique (LadHyX), UMR 7646 CNRS-Ecole Polytechnique, IP Paris,91128 Palaiseau CEDEX, France, LadHyX, CNRS, Ecole Polytechnique, Palaiseau, France, Laboratoire d'Hydrodynamique (LadHyX), UMR 7646 CNRS-Ecole Polytechnique, IP Paris, 91128 Palaiseau CEDEX, France, LadHyX, CNRS, Ecole Polytechnique,

Authors

  • Christophe F Josserand

    CNRS, Ecole Polytechnique, Laboratoire d'Hydrodynamique (LadHyX), UMR 7646 CNRS-Ecole Polytechnique, IP Paris,91128 Palaiseau CEDEX, France, LadHyX, CNRS, Ecole Polytechnique, Palaiseau, France, Laboratoire d'Hydrodynamique (LadHyX), UMR 7646 CNRS-Ecole Polytechnique, IP Paris, 91128 Palaiseau CEDEX, France, LadHyX, CNRS, Ecole Polytechnique,

  • Rodolphe Grivet

    LadHyX, LadHyX, CNRS, Ecole Polytechnique, Palaiseau, France, LadHyX, CNRS, Ecole Polytechnique

  • Thomas Seon

    IJLRA, Institut d'Alembert, CNRS, Sorbonne Université, Sorbonne Université, CNRS, UMR 7190, Institut Jean Le Rond ∂'Alembert, F-75005 Paris,France, Sorbonne Université, CNRS, UMR 7190, Institut Jean Le Rond d'Alembert, F-75005 Paris, France

  • Axel Huerre

    MSC, MSC, Université de Paris, CNRS (UMR 7057), 75013 Paris, France, MSC, CNRS, Université Paris Diderot, Paris, France, MSC, Université de Paris, Université Paris Diderot, CNRS (UMR 7057), 75013 Paris, France, MSC, CNRS, Université Paris Diderot