Hydrodynamic particle migration in a concentrated suspension undergoing flow between rotating eccentric cylinders
Journal Article
·
· Industrial and Engineering Chemistry Research
- Univ. of Sydney, New South Wales (Australia). Mechanical Engineering Dept.
- Los Alamos National Lab., NM (United States)
- Lovelace Inst., Albuquerque, NM (United States)
- Sandia National Labs., Albuquerque, NM (United States)
The authors report on experimental measurements and numerical predictions of shear-induced migration of particles in concentrated suspensions subjected to flow in the wide gap between a rotating inner cylinder placed eccentrically within a fixed outer cylinder (a cylindrical bearing). The suspensions consist of large noncolloidal spherical particles suspended in a viscous Newtonian liquid. Nuclear magnetic resonance imaging is used to measure the time evolution of concentration and velocity profiles as the flow induces particle migration from the initial well-mixed state. The experimental results are compared against numerical predictions for the concentration and velocity profiles. The coupled equations of motion and particle migration are solved numerically for a generalized Newtonian fluid with concentration-dependent viscosity with an explicit pseudotransient finite volume code. While not all of the qualitative features of the flow field are reproduced by the model, there is acceptable overall agreement with the experimental data.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 183002
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 10 Vol. 34; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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