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Fibre orientation measurements near a headbox wall
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
2010 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 25, no 2, 204-212 p.Article in journal (Refereed) Published
Abstract [en]

Experimental results on the fibre orientation in a laboratory scale headbox are reported. Images containing fibres in approximately 1 mm thick slices parallel to the wall were captured at different wall distances. A steerable filter was used to determine the orientation of bleached and unbeaten birch fibres, suspended in water, at different distances from one of the inclined walls of the headbox contraction. Due to optical limitations only dilute suspensions were studied. It is shown that the fibre orientation distribution varies with the distance from the wall. Sufficiently far upstream in the headbox a more anisotropic distribution is found closer to the wall.

Place, publisher, year, edition, pages
2010. Vol. 25, no 2, 204-212 p.
Keyword [en]
Anisotropy, Boundary layer, Fibre suspension, Headbox, Orientation, Shear flow
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kth:diva-150042Scopus ID: 2-s2.0-79551532145OAI: oai:DiVA.org:kth-150042DiVA: diva2:742310
Note

QC 20140901

Available from: 2014-09-01 Created: 2014-08-29 Last updated: 2017-12-05Bibliographically approved

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