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Christelle Fritz, Olivier Pitois and Michèle Vignes-Adler

Christelle Fritz, Olivier Pitois and Michèle Vignes-Adler. Settling of Solid Particles in Plateau Borders and Nodes. Plateau border. Node. Hydrophobic particles are attached to bubble interfaces. Hydrophilic particles are transported through the liquid phase.

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Christelle Fritz, Olivier Pitois and Michèle Vignes-Adler

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  1. Christelle Fritz, Olivier Pitois and Michèle Vignes-Adler Settling of Solid Particles in Plateau Borders and Nodes Plateau border Node Hydrophobic particles are attached to bubble interfaces. Hydrophilic particles are transported through the liquid phase. Separation of minerals using the flotation technique The objective of this work is to provide new information on the particle transport on the local scale. Experiment Image processing Plateau border area Node area Control of the liquid fraction foam DP=rgDh cell reservoir sintered glass plate Static conditions « Mobile Pb » r=600µm r=500µm Dh= 7mm liquid 1 mm Plateau border section at the cell windows Particle injection system « Rigid Pb » Particles: spherical glass beads Diameters: d = [15µm, 45µm] Deceleration Acceleration , , Particle diameter 35 µm, Dt= 640 ms camera Boundary conditions Particle sedimentation Prospects « Mobile » SDS(3g/L)+ Dodecanol (0.01g/L) hS = 2.10-5 g/s * q = 55° « Rigid » SDS(3g/L)+ Dodecanol (0.1g/L) hS = 2.10-3 g/s * v Collective effects dlim * Liquid drainage through aqueous foam: study of the flow on the bubble scale. JCIS 2004 R d particle Giant Plateau border with solid surfaces r=30 mm Sedimentation + Liquid flow mobile rigid solid particles : spherical glass beads Diameters: d = [1.5;5 mm] Liquid: oil

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