On the mobility of flowing papermaking suspensions and its relationship to formation

D.M. Martinez, Harri Kiiskinen, A.-K. Ahlman, R. Kerekes

    Research output: Contribution to journalArticleScientificpeer-review

    27 Citations (Scopus)

    Abstract

    The mobility of flowing papermaking fibre suspensions has been characterized by measuring the changes in paper properties formed in a novel laboratory device. For the conditions tested, properties such as formation and fibre orientation were observed to change significantly when. the ratio of the yield stress τ0 of the suspension to the energy dissipated by the fluid, defined as ε in this work, exceed ε ∼ 10-2, i.e ε=τ0/ρU2>10-2 (1) where p is the density of the suspension and U is a characteristic velocity. In subsequent work, changes information were measured as a function of ε on both an experimental pilot paper machine and on 18 different industrial machines. Formation was found to diminish at approximately the same level of ε. this implies that paper machine operations may be optimized to a degree hitherto not done.
    Original languageEnglish
    Pages (from-to)341-347
    Number of pages7
    JournalJournal of Pulp and Paper Science
    Volume29
    Issue number10
    Publication statusPublished - 2003
    MoE publication typeA1 Journal article-refereed

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