0

0.5

1

1.5

2

0 0.2 0.4 0.6 0.8 1

d/d lim

v.sin(

θ)/vStokes

Christelle Fritz, Olivier Pitois and Michèle Vignes-Adler

Control of the liquid fraction

Giant Plateau border with solid surfaces

h= 7mm

P=gh

Static conditions

spherical glass beadsDiameters: d = [15µm, 45µm]

Experiment

particles : spherical glass beadsDiameters: d = [1.5;5 mm]Liquid: oil

Particles:

Boundary conditions

« Mobile »

« Rigid »

Image processing

SDS(3g/L)+ Dodecanol (0.01g/L)

S = 2.10-5 g/s *

SDS(3g/L)+ Dodecanol (0.1g/L)

S = 2.10-3 g/s *

* Liquid drainage through aqueous foam: study of the flow on the bubble scale.

JCIS 2004

« R

igid

Pb

»«

Mo

bile

Pb

»

Particle diameter 35 µm, t= 640 ms

Plateau border section at the cell windows

r=500µm r=600µm

reservoircell

Plateau border

Node

, , camera

Particle injection system

foam

Node area

AccelerationDeceleration

Plateau border area

Hydrophobic particles are attached to bubble interfaces.

Hydrophilic particles are transported through the liquid phase.

Separation of minerals using the flotation technique

Prospects

Collective effects

Sedimentation

+

Liquid flow

1 mm

sintered glass plate

liquid

The objective of this work is to provide new information on the particle transport on the local scale.

mobile

rigid

solid

θ

Rdlim

d particle

v

r=30 mm

Particle sedimentation

Settling of Solid Particles in Plateau Borders and Nodes

Settling of Solid Particles in Plateau Borders and Nodes