2018
DOI: 10.2355/isijinternational.isijint-2018-245
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A Semi-Empirical Model of Particle Velocity in Foam

Abstract: A semi-empirical model was developed to predict the apparent velocity of particles falling through foams. Different foams were generated from liquids with different viscosities and surface tensions. Particles with different sizes and densities were dropped into the foam and average velocities were calculated. Based on the experimental work, the semi-empirical model was derived from an energy balance between buoyancy, drag and the energy needed for the particles to deform the bubbles in their path.

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Cited by 10 publications
(8 citation statements)
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“…This is in accordance to a previous study, where it was shown that when Ø2 mm iron particles were put into a sugar solution foam, the iron particles are almost stationary in the foam. 32) Nevertheless, the effect of the residence time of the particles in the liquid on foaming need further careful investigation.…”
Section: Foaming Heightmentioning
confidence: 99%
“…This is in accordance to a previous study, where it was shown that when Ø2 mm iron particles were put into a sugar solution foam, the iron particles are almost stationary in the foam. 32) Nevertheless, the effect of the residence time of the particles in the liquid on foaming need further careful investigation.…”
Section: Foaming Heightmentioning
confidence: 99%
“…Today, many researchers, including the present authors, [112,130,131] design and conduct cold model experiments to imitate the foaming phenomena. Although using a cold model can be very helpful and efficient, the results in cold model studies should be used with caution.…”
Section: Structure Of Foaming Slagmentioning
confidence: 99%
“…To check how well the Stokes law can describe the velocity of falling particles in non-Newtonian fluid, the residence times and velocities of different solid particles (different densities and sizes) were measured while they were falling in different foams by the present group. [131] The specific experimental settings and conditions can be found in the earlier publication. It was found that the surface tension plays a significant role in the residence time, which is, of course, not considered in Stokes law (see Equation ( 17)).…”
Section: Particle and Droplet Movement In Foammentioning
confidence: 99%
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