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Fibre orientation measurements near a headbox wall
RISE., Innventia.
2010 (Engelska)Ingår i: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 25, nr 2, s. 204-212Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
2010. Vol. 25, nr 2, s. 204-212
Nyckelord [en]
Anisotropy, Boundary layer, Fibre suspension, Headbox, Orientation, Shear flow
Nationell ämneskategori
Pappers-, massa- och fiberteknik
Identifikatorer
URN: urn:nbn:se:ri:diva-29524Scopus ID: 2-s2.0-79551532145OAI: oai:DiVA.org:ri-29524DiVA, id: diva2:1095692
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Tillgänglig från: 2017-05-15 Skapad: 2017-05-15 Senast uppdaterad: 2017-05-15Bibliografiskt granskad

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