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Saingier Guillaume

Contact information

Laboratoire Surface du Verre et Interfaces

Unité mixte CNRS/Saint-Gobain, UMR 125

39 quai Lucien Lefranc

93303 Aubervilliers

tel : +33 (0)1.48.39.54.20

guillaume.saingier@saint-gobain.com


Research interests

- Granular Materials
- Experimental Hydrodynamics
- Complex Fluids and Rheology


Current research

"Blending liquid into a dry granular material."

Keywords: Granular materials, capillarity, mixing, accretion, erosion

PhD Supervisors: Pierre Jop (CNRS/ SVI), Alban Sauret (CNRS/ SVI)

Wet granular materials are commonly used in several industrial processes (building materials, food industry …). The addition of a small amount of fluid in the dry granular media induces a strong cohesion due to the appearance of capillary bridges between the grains [1]. Most situations of wet granular materials studied in the literature are limited to homogeneous and static systems. The dynamics of the triphasic systems (liquid, air, grains) is still misunderstood, particularly when exchanges are observed between dry and wet phases. The first aim of my work is to characterize and model the dynamics and the mechanisms of the liquid impregnation into a flowing dry granular material [2]. Thanks to model experiments, we have identified the dynamics of accretion of dry grains on a wet aggregate. This work highlights the crucial role of the liquid interfaces in the dynamics [3].

[1] Flurorescence microscope image of capillary bridges between glass beads, from Herminghaus (2005). [2] Experiment of dynamical imbibition in a flowing dry granular material. [3] Dry grains impacting a wet saturated aggregate.


Previous research

  • "Experimental and numerical study of dry granular flows in thin layers: shape of a granular front, stop dynamics and wall effects"
    Institut Jean le Rond d’Alembert (UPMC, France).
    M2 Research internship (6 months)
  • "Study of induction heating system - Elaboration of an experimental set-up for heavy oil extraction"
    Centre Scientifique et Technique Jean Féger (Total, France)
    ESPCI Engineer internship (6 months)

Background

  • 2011 – 2015 : ESPCI ParisTech - École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris - Graduate engineering school of physics, chemistry and biology - Specialty Physics.

Publications

- G. Saingier, A. Sauret & P. Jop, "Accretion dynamics on wet granular materials", Phys. Rev. Lett., 118, 208001 (2017) [PDF]

- G. Saingier, S. Deboeuf & P.-Y. Lagrée, "On the front shape of an inertial granular flow down a rough incline", Phys. Fluids 28, 053302 (2016) [PDF]