The influence of wetting on the buoyancy of particles

Bowen, James; Cheneler, David; Ward, Mike and Adams, Michael J (2011). The influence of wetting on the buoyancy of particles. In: UK-China Particle Technology Forum III, 3-6 Jul 2011, Birmingham, UK.



The effect of wetting on the ability of solid millimetre-sized and smaller particles to float on a liquid of lower density than the particle material has been considered theoretically and investigated experimentally. The contribution of capillary force towards particle buoyancy is assessed for a range of systems, as well as the range of diameters of particles which could be buoyant for each combination of solid and liquid. The critical parameters in this evaluation of particle buoyancy were considered to be (i) solid density, (ii) liquid density, (iii) liquid surface tension, and (iv) interfacial wetting between solid and liquid phases.

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