Particle-level simulations of flocculation in a fiber suspension flowing through a diffuser
We investigate flocculation in dilute suspensions of rigid, straight fibers in a decelerating flow field of a diffuser. We carry out numerical studies using a particle-level simulation technique that takes into account the fiber inertia and the non-creeping fiber-flow interactions. The fluid flow is...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
VINCA Institute of Nuclear Sciences
2017-01-01
|
Series: | Thermal Science |
Subjects: | |
Online Access: | http://www.doiserbia.nb.rs/img/doi/0354-9836/2017/0354-98361600185A.pdf |
id |
doaj-4419a908864f4d93a7b2434ba1cbf275 |
---|---|
record_format |
Article |
spelling |
doaj-4419a908864f4d93a7b2434ba1cbf2752021-01-02T05:01:00ZengVINCA Institute of Nuclear SciencesThermal Science0354-98362334-71632017-01-0121suppl. 357358310.2298/TSCI160510185A0354-98361600185AParticle-level simulations of flocculation in a fiber suspension flowing through a diffuserAndrić Jelena S.0Lindstrom Stefan B1Sasic Srđan M.2Nilsson Håkan3Chalmers University of Technology, Department of Applied Mechanics, Göteborg, SwedenThe Institute of Technology, Linköping University, Department of Management and Engineering, Linköping, SwedenChalmers University of Technology, Department of Applied Mechanics, Göteborg, SwedenChalmers University of Technology, Department of Applied Mechanics, Göteborg, SwedenWe investigate flocculation in dilute suspensions of rigid, straight fibers in a decelerating flow field of a diffuser. We carry out numerical studies using a particle-level simulation technique that takes into account the fiber inertia and the non-creeping fiber-flow interactions. The fluid flow is governed by the Reynolds-averaged Navier-Stokes equations with the standard k-omega eddy-viscosity turbulence model. A one-way coupling between the fibers and the flow is considered with a stochastic model for the fiber dispersion due to turbulence. The fibers interact through short-range attractive forces that cause them to aggregate into flocs when fiber-fiber collisions occur. We show that ballistic deflection of fibers greatly increases the flocculation in the diffuser. The inlet fiber kinematics and the fiber inertia are the main parameters that affect fiber flocculation in the prediffuser region.http://www.doiserbia.nb.rs/img/doi/0354-9836/2017/0354-98361600185A.pdffiber suspensionballistic deflectiondecelerating flowflocculationdiffuser |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Andrić Jelena S. Lindstrom Stefan B Sasic Srđan M. Nilsson Håkan |
spellingShingle |
Andrić Jelena S. Lindstrom Stefan B Sasic Srđan M. Nilsson Håkan Particle-level simulations of flocculation in a fiber suspension flowing through a diffuser Thermal Science fiber suspension ballistic deflection decelerating flow flocculation diffuser |
author_facet |
Andrić Jelena S. Lindstrom Stefan B Sasic Srđan M. Nilsson Håkan |
author_sort |
Andrić Jelena S. |
title |
Particle-level simulations of flocculation in a fiber suspension flowing through a diffuser |
title_short |
Particle-level simulations of flocculation in a fiber suspension flowing through a diffuser |
title_full |
Particle-level simulations of flocculation in a fiber suspension flowing through a diffuser |
title_fullStr |
Particle-level simulations of flocculation in a fiber suspension flowing through a diffuser |
title_full_unstemmed |
Particle-level simulations of flocculation in a fiber suspension flowing through a diffuser |
title_sort |
particle-level simulations of flocculation in a fiber suspension flowing through a diffuser |
publisher |
VINCA Institute of Nuclear Sciences |
series |
Thermal Science |
issn |
0354-9836 2334-7163 |
publishDate |
2017-01-01 |
description |
We investigate flocculation in dilute suspensions of rigid, straight fibers in a decelerating flow field of a diffuser. We carry out numerical studies using a particle-level simulation technique that takes into account the fiber inertia and the non-creeping fiber-flow interactions. The fluid flow is governed by the Reynolds-averaged Navier-Stokes equations with the standard k-omega eddy-viscosity turbulence model. A one-way coupling between the fibers and the flow is considered with a stochastic model for the fiber dispersion due to turbulence. The fibers interact through short-range attractive forces that cause them to aggregate into flocs when fiber-fiber collisions occur. We show that ballistic deflection of fibers greatly increases the flocculation in the diffuser. The inlet fiber kinematics and the fiber inertia are the main parameters that affect fiber flocculation in the prediffuser region. |
topic |
fiber suspension ballistic deflection decelerating flow flocculation diffuser |
url |
http://www.doiserbia.nb.rs/img/doi/0354-9836/2017/0354-98361600185A.pdf |
work_keys_str_mv |
AT andricjelenas particlelevelsimulationsofflocculationinafibersuspensionflowingthroughadiffuser AT lindstromstefanb particlelevelsimulationsofflocculationinafibersuspensionflowingthroughadiffuser AT sasicsrđanm particlelevelsimulationsofflocculationinafibersuspensionflowingthroughadiffuser AT nilssonhakan particlelevelsimulationsofflocculationinafibersuspensionflowingthroughadiffuser |
_version_ |
1724360016511631360 |