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A model for flexible fibres in viscous and inert fluid
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
Responsible organisation
2007 (English)In: 61st Appita annual conference and exhibition, Gold Coast, Australia, 6-9 May 2007, 2007 International paper physics conference, 6pp [Carlton, Australia: Appita, 2007, 2007, 23-28 p.Conference paper, Published paper (Other scientific)
Abstract [en]

A model is proposed for simulating the motion of flexible fibres in fluid flow. Care has been taken to include typical papermaking conditions into the validity range of the model. Fibres are modelled as chains of fibre segments, whose motion is governed by Newton's second law. The fluid motion is calculated from the three-dimensional incompressible Navier-Stokes equations. By enforcing momentum conservation, the two-way coupling between the solids and fluid phase is taken into account. Fibre-fibre interactions as well as self-interactions include normal, frictional and lubrication forces. Furthermore, the model considers nonlaminar fibre-fluid interactions and particle inertia. Simulation results were compared with experimental data found in the literature. The model predicts very well the orbit period of rigid fibre motion in shear flow. Quantitative predictions were made for the amount of bending of flexible fibres in shear flow. It was also possible to reproduce the different regimes of motion of flexible fibres in shear flow, ranging from rigid motion to coiled motion and self-entanglement.

Place, publisher, year, edition, pages
2007. 23-28 p.
Keyword [en]
fibre, fibre suspension, simulation, flow
National Category
Chemical Engineering Other Engineering and Technologies
Identifiers
URN: urn:nbn:se:miun:diva-4272Local ID: 5050OAI: oai:DiVA.org:miun-4272DiVA: diva2:29304
Projects
Stochastic Modelling of Paper Structures
Available from: 2008-11-20 Created: 2008-11-14 Last updated: 2008-11-20Bibliographically approved

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Lindström, StefanUesaka, Tetsu
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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • vancouver
  • Other style
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Language
  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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Output format
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  • asciidoc
  • rtf