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


    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
    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


    ConferenceCOST Action FP1005 Final Conference, Jointly with EUROMECH Colloquium 566


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


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