Detailed measurement of fibre suspension pipe flow velocity profile

Roope Lehto, Sanna Haavisto, Maria Cardona, Juha Salmela, Michael McCarthy, Robert Powell, Antti Koponen, Markku Kataja

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

A rheometric method based on velocity profiling simultaneously by optical coherence tomography (OCT) and magnetic resonance imaging (MRI) was introduced and used in a preliminary study of the rheological and boundary layer flow properties of a microfibrillated cellulose. The two velocity profiling methods appear adequate and complementary for rheological characterization of opaque complex fluids. The MRI technique is useful in measuring the velocity profile in the interior parts of the tube, while the optical technique is capable of high-resolution measurement of the boundary layer flow close to the tube wall. The results indicate typical shear thinning behaviour in the interior part of the tube. The near wall behaviour shows existence of a slip layer related to a concentration gradient near the tube wall.
Original languageEnglish
Title of host publicationCOST Action FP1005 Final Conference
Subtitle of host publicationEUROMECH Colloquium 566
PublisherEuropean Cooperation in Science and Technology COST
Pages22-24
Publication statusPublished - 2015
MoE publication typeB3 Non-refereed article in conference proceedings
EventCOST Action FP1005 Final Conference, Jointly with EUROMECH Colloquium 566: Anisotropic particles in turbulence - Trondheim, Norway
Duration: 9 Jun 201512 Jun 2015

Conference

ConferenceCOST Action FP1005 Final Conference, Jointly with EUROMECH Colloquium 566
CountryNorway
CityTrondheim
Period9/06/1512/06/15

Keywords

  • rheology
  • flow
  • optical coherence tomography
  • OCT
  • wall slip
  • slip flow
  • MFC

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  • Cite this

    Lehto, R., Haavisto, S., Cardona, M., Salmela, J., McCarthy, M., Powell, R., Koponen, A., & Kataja, M. (2015). Detailed measurement of fibre suspension pipe flow velocity profile. In COST Action FP1005 Final Conference: EUROMECH Colloquium 566 (pp. 22-24). European Cooperation in Science and Technology COST. http://calliope.dem.uniud.it/COST/downloads/Book_of_Abstracts.pdf