The effect of fibrous materials on the rheology of aqueous foams

Ari Jäsberg, Pasi Selenius, Antti Koponen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    We studied fully developed pipe flow of fibre-laden aqueous foams and decoupled their bulk rheological properties boundary effects like slippage at the pipe wall. The air volume fraction of the foams varied between 70% and 75%. The addition of hardwood fibres at the consistency 20 g/kg to plain aqueous foam increased viscosity more than 100%, while with microfibrillated cellulose at a consistency of 25 g/kg the increase was about 30%. The effect of synthetic (cellulosic)rayon fibres was negligible at the consistency of 20 g/kg. All the studied foams could be described as shear-thinning power-law fluids with significant slippage at the pipe wall by particles size and interactions between particles and bubbles.
    Original languageEnglish
    Title of host publicationAdvances in pulp and paper research
    Subtitle of host publicationTransactions of the 16th Fundamental Research Symposium held in Oxford
    EditorsWarren Batchelor, Daniel Söderberg
    PublisherPulp & Paper Fundamental Research Society
    Pages159-174
    ISBN (Print)978-0-9926163-3-5
    Publication statusPublished - 2017
    MoE publication typeA4 Article in a conference publication
    Event16th Fundamental Research Symposium, Advances in Pulp and Paper Research - Oxford, United Kingdom
    Duration: 3 Sep 20178 Sep 2017

    Conference

    Conference16th Fundamental Research Symposium, Advances in Pulp and Paper Research
    Country/TerritoryUnited Kingdom
    CityOxford
    Period3/09/178/09/17

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