Rheological effects of nonuniform particle distributions in dilute suspensions

McTigue, D. F.; Givler, Richard C.; Nunziato, Jace W.

doi:10.1122/1.549845

Cited by 44 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Subsequent work has shown that this phenomenon is quite general, being observed both experimentally and computationally in Poiseuille 3,4 and Couette [5][6][7] flows, and also as a function of particle density, 8,9 asphericity, and/or deformability. 10,11 The cause of migration in these flows has largely been attributed to buoyancy effects 12,13 and/or non-linear fluid effects, [14][15][16] which arise at moderate Reynolds numbers; however, particle migration has also been observed in dense multiparticle flows even in the case of vanishing Reynolds number (that is, an ideal Stokes' flow). This is credited to hydrodynamic interactions between the particles 17 and termed "shearinduced migration."…”

Section: Introductionmentioning

confidence: 97%

Particle migration in the rotating flow between co‐axial disks

2006

View full text Add to dashboard Cite

We experimentally examine a dilute suspension of non-neutrally buoyant spherical particles migrating in a simple mixing tank at small but finite Reynolds numbers. We observe that the particles spontaneously migrate to repeatable non-trivial asymptotic locations within toroidal structures, located above and below at-disk impellers. The asymptotic migration positions include both the exact center of the torus and intermediate higher-order cluster locations within the flow whose stability is dependent on flow andparticle conditions. Furthermore, we note that the particle clusters seem to coincide with the location of unmixed islands within the underlying fluid flow. We also observe a migratory competition when multiple particles are introduced into the flow.

show abstract

Section: Introductionmentioning

confidence: 97%

Particle migration in the rotating flow between co‐axial disks

2006

View full text Add to dashboard Cite

show abstract

“…The rougher the fracture wall, the greater the velocity of particles in comparison with the mean flow velocity. Such an effect was noted first, probably, by Small et al (1976), and an attempt at its interpretation was made by McTigue et al (1986). Champ and Schroeter (1988) and Harvey et al (1989) stated that, in their field experiments, the rate of migration of colloidal particles in the geologic medium was much higher than the mean velocity of subsurface water flow.…”

Section: Mobility Of Colloidal Particlesmentioning

confidence: 92%

Effect of colloids on transfer of radionuclides by subsurface water

Malkovsky

Pék

2009

Geol. Ore Deposits

View full text Add to dashboard Cite

The fluid transfer of radionuclides in the geologic medium is considered under conditions when radionuclides are contained in fluids not only as solutes but also as colloids. The effect of colloidal transport of radionuclides on the rate of spreading of radioactive contamination in an underground medium is estimated, with assessment of this effect in mathematical models describing the transport of radionuclides by subsurface water. For this purpose, the exchange of radionuclides between subsurface water, colloid, and an immobile solid phase is considered, taking into account the precipitation of colloidal particles on both the immobile solid phase and other colloidal particles and their recurrent mobilization into the liquid phase. It is noted that, in real colloidal transfer, the heterogeneity of the geologic medium and colloidal particles in subsurface water is of great importance. The known models of colloidal transfer of radionuclides are evaluated on the basis of the analysis performed.

show abstract

“…However, it is also possible to obtain the particle velocity directly as described by Meyer [150]. Recently, McTigue et al [151] developed a continuum mixture theory for the slow flow of a dilute suspension of solid particle in a viscous fluid.…”

Section: Role Of Hydrodynamics In Deposition Processesmentioning

confidence: 99%