miun.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Study of geometry effects in torsional rheometry of fibre suspensions
Chalmers.
Department of Materials Science and Engineering, Chalmers University of Technology.
2004 (English)In: Rheologica Acta, ISSN 0035-4511, E-ISSN 1435-1528, Vol. 44, no 44, p. 29-37Article in journal (Refereed) Published
Abstract [en]

This work concerns the problem of measuring the viscosity of a suspension of fibres that are not short compared to the dimensions of the measurement device. We have examined various geometry effects in shear using parallel-plate and cone-and-plate configurations. Steady state viscosity, transient viscosity and first normal stress difference have been studied. Silicone oil with milled glass fibres at 8 vol.% was used as a model fibre suspension. The conventional parallel-plate geometry exhibits a significant gap dependence of the apparent viscous response. Too small gaps constrain the fibre rotations, thus lowering the initial stress peak and delaying the development of steady state. Too large gaps lead to a loss of liquid at the sample perimeter, which reduces the apparent steady state viscosity. The steady state response, however, seems to be correct for gaps in the range 1 - 2 mm when the maximum fibre length is 1.5 mm. The cone-and-plate geometry is less sensitive to large gaps. Too small a gap at the ( truncated) cone apex leads to anomalous response due to bridging of the gap by fibres. The use of unusually large plates ( 100 mm diameter) and different cone angles and truncations was explored. It was shown that cone-and-plate configurations of large diameter and large truncation can effectively decrease the geometry disturbances both due to fibre bridging at the cone apex and loss of liquid at the edge.

Place, publisher, year, edition, pages
Springer-Verlag , 2004. Vol. 44, no 44, p. 29-37
Identifiers
URN: urn:nbn:se:miun:diva-11300DOI: 10.1007/s00397-004-0363-xOAI: oai:DiVA.org:miun-11300DiVA, id: diva2:298340
Available from: 2010-02-22 Created: 2010-02-22 Last updated: 2017-12-12Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records BETA

Ebrahimzadeh, P Reza

Search in DiVA

By author/editor
Ebrahimzadeh, P Reza
In the same journal
Rheologica Acta

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 737 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf