Effect of fibres on wet foams

    Research output: Contribution to conferenceOther conference contributionScientific

    Abstract

    Wet foam is an excellent carrier phase to produce particle or fibre structures. Thus, it is important to know how particles or fibres affect foam properties. We have studied these effects for foams generated by axially agitated mixing with 60-80% air content. Onset of a flow macro-instability is observed at high rotation speeds both with and without cellulose fibres. The air content of the foam is strongly affected by this instability. By describing the effect of the air content on the stability of bubble interfaces, we explain the bubble size for broad ranges of rotation speed and surface tension. Added fibres usually reduce the bubble size for a fixed rotation speed. After the flow macro-instability, not only the air content but also the bubble size increases with reduced surface tension. Beyond the instability, the effect of fibres on foam properties becomes minor.
    Original languageEnglish
    Publication statusPublished - 2014
    EventFoams and Minimal Surfaces - 12 years on - Cambridge, United Kingdom
    Duration: 24 Feb 201428 Feb 2014

    Conference

    ConferenceFoams and Minimal Surfaces - 12 years on
    Country/TerritoryUnited Kingdom
    CityCambridge
    Period24/02/1428/02/14

    Keywords

    • foam
    • fibre
    • mixing
    • air content
    • bubble size
    • flow

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