# Finite Element Modeling of Suspended Particle Migration in Non-Newtonian Fluids

## Abstract

Shear-induced migration of particles is studied during the slow flow of suspensions of spheres (particle volume fraction {phi} = 0.50) in an inelastic but shear-thinning, suspending fluid in flow between counterrotating concentric cylinders, The conditions are such that nonhydrodynamic effects are negligible. The movement of particles away from the high shear rate region is more pronounced than in a Newtonian suspending liquid. We test a continuum constitutive model for the evolution of particle concentration in a flowing suspension proposed by Phillips et al. (1992) by using shear-thinning, suspending fluids. The fluid constitutive equation is Carreau-like in its shear-thinning behavior but also varies with the local particle concentration. The model is compared with the experimental data gathered with nuclear magnetic resonance (NMR) imaging.

- Authors:

- Publication Date:

- Research Org.:
- Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)

- Sponsoring Org.:
- US Department of Energy (US)

- OSTI Identifier:
- 4200

- Report Number(s):
- SAND99-0213C

TRN: AH200113%%111

- DOE Contract Number:
- AC04-94AL85000

- Resource Type:
- Conference

- Resource Relation:
- Conference: Rheology in the Mineral Industry II, Honolulu, HI (US), 03/14/1999--03/19/1999; Other Information: PBD: 4 Mar 1999

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; MINERAL INDUSTRY; NUCLEAR MAGNETIC RESONANCE; RHEOLOGY; SHEAR; SUSPENSIONS; FLOW MODELS; PARTICULATES; TWO-PHASE FLOW

### Citation Formats

```
Altobelli, S, Baer, T, Mondy, L, Rao, R, and Stephens, T.
```*Finite Element Modeling of Suspended Particle Migration in Non-Newtonian Fluids*. United States: N. p., 1999.
Web.

```
Altobelli, S, Baer, T, Mondy, L, Rao, R, & Stephens, T.
```*Finite Element Modeling of Suspended Particle Migration in Non-Newtonian Fluids*. United States.

```
Altobelli, S, Baer, T, Mondy, L, Rao, R, and Stephens, T. Thu .
"Finite Element Modeling of Suspended Particle Migration in Non-Newtonian Fluids". United States. https://www.osti.gov/servlets/purl/4200.
```

```
@article{osti_4200,
```

title = {Finite Element Modeling of Suspended Particle Migration in Non-Newtonian Fluids},

author = {Altobelli, S and Baer, T and Mondy, L and Rao, R and Stephens, T},

abstractNote = {Shear-induced migration of particles is studied during the slow flow of suspensions of spheres (particle volume fraction {phi} = 0.50) in an inelastic but shear-thinning, suspending fluid in flow between counterrotating concentric cylinders, The conditions are such that nonhydrodynamic effects are negligible. The movement of particles away from the high shear rate region is more pronounced than in a Newtonian suspending liquid. We test a continuum constitutive model for the evolution of particle concentration in a flowing suspension proposed by Phillips et al. (1992) by using shear-thinning, suspending fluids. The fluid constitutive equation is Carreau-like in its shear-thinning behavior but also varies with the local particle concentration. The model is compared with the experimental data gathered with nuclear magnetic resonance (NMR) imaging.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {1999},

month = {3}

}