Dimensionless Methods for the Study of Particle Settling in Non-Newtonian Fluids

A drag force measurement method is presented which makes it possible to study the settling of particles in transparent and opaque fluids. A dimensionless treatment that takes into account the shear thinning effects of fluids was applied to normalize the measured drag force data. A wide range of particle Reynolds numbers can be covered by this method and a profile of friction factor versus Reynolds number can be established by the proposed dimensionless treatment. An algorithm for the prediction of settling of particles in non-Newtonian fluids was introduced. It can be executed by a computer program. With a good set of experimental data, the settling velocities predicted by the computer model are very close to the measured ones in the fluids tested. This method can be used to study the suspension properties of drilling and fracturing fluids, transparent or opaque. The wide coverage of Reynolds number range simplifies the experiment.

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Estimation of shear rate change in vertically oscillating non-Newtonian fluids: Predictions on particle settling

Journal of Non-Newtonian Fluid Mechanics ◽

10.1016/j.jnnfm.2020.104236 ◽

2020 ◽

Vol 277 ◽

pp. 104236 ◽

Cited By ~ 1

Author(s):

Maduranga Amaratunga ◽

Herimonja A. Rabenjafimanantsoa ◽

Rune W. Time

Keyword(s):

Shear Rate ◽

Newtonian Fluids ◽

Rate Change ◽

Particle Settling

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Investigation on The Particle Settling Velocity in Non-Newtonian Fluids

Journal of Applied Sciences ◽

10.3923/jas.2011.1528.1535 ◽

2011 ◽

Vol 11 (9) ◽

pp. 1528-1535 ◽

Cited By ~ 5

Author(s):

Rawia Abd Elgadir Eltahir El ◽

Hussain H. Al Kayiem ◽

Azuraien Jaafar

Keyword(s):

Settling Velocity ◽

Newtonian Fluids ◽

Particle Settling

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Multiparticle Settling in Non-Newtonian Fluids

10.1115/imece1999-1171 ◽

1999 ◽

Author(s):

Qinsheng Zhu ◽

Peter E. Clark

Keyword(s):

Experimental Work ◽

Single Particle ◽

Periodic Motion ◽

Large Body ◽

Particle Systems ◽

Newtonian Fluids ◽

Particle Settling ◽

Mineral Extraction ◽

Multiparticle Systems ◽

Settling Of Particles

Abstract The settling of particles in non-Newtonian fluids is an important topic in industries from pharmaceuticals and foods to mineral extraction and construction. A large body of experimental work is available on single particle settling in both Newtonian and non-Newtonian fluids. Multi-particle systems are less well studied. Most reported work in multiparticle systems has been in Newtonian fluids. Recently, there has been increasing interest in multiparticle settling in non-Newtonian fluids. This paper will review some of the more important of these studies and present some new data on periodic motion observed in systems of three or more particles.

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