Complex fluids

Complex fluids


Complex fluids

Dynamique des fluides et des interfaces (DF)

Our centers of interest focus on the surface and interface dynamics in hydrodynamics, in soft matter and in crystal growth. Our studies are based upon both experimental and theoretical investigations. The understanding of the fundamental mechanisms governing interfacial dynamics corresponds to important stakes in the modelling of natural phenomenon as well as in industrial applications. Our activities mainly concern:

  • The propagation of nonlinear waves: i) At the free surfaces of liquids: experimental evidences for new types of large amplitude solitary waves. ii) In grain piles or in solid cellular materials, direct visualization of the sound waves propagation by means of the induced birefringency. iii) In soap foams, by direct visualization or by X-ray microtomography of the flow in the liquid films or micro-channels.
  • Dynamics of capillary objects (jets, drops and films): i) Local study of the drainage in soap films in various configurations: impact of a liquid jet or film rotation. ii) Dynamics of droplets, jets and elastic solids. iii) Leidenfrost effect of droplets submitted to thermal or magnetic forcing. iv) Condensation phenomenon and dew recovering in dry countries: covering and process optimisation (use of super-hydrophobic or absorbent surfaces). v) Rearrangement of the bubbles in a flowing foam; use of fast X-ray microtomography. 
  • Dynamics of growth patterns: i) Modelling of quantum dots via hetero-epitaxy in semi-conductors. ii) Morphogenesis in basalt columns.