Wet granular flow control through liquid induced cohesion

Ahmed Jarray*, Vanessa Magnanimo, Stefan Luding

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    6 Citations (Scopus)
    60 Downloads (Pure)

    Abstract

    Liquid induced cohesion has a significant effect on the flow characteristics of wet granular assemblies. The strength of capillary forces between the particles can be continuously tuned by making the glass beads hydrophobic via chemical silanization. Main results of rotating drum experiments are that stronger liquid-induced cohesion decreases the width of the flowing region, the velocity of the particles at the free surface and the local granular temperature, but in contrast, increases the width of the creeping region as well as the dynamic angle of repose. Our proposed scaling methodology yields invariant bed flow characteristics for different particle sizes in the flow regimes considered (rolling and cascading regimes), and thus allows to control the flow.

    Original languageEnglish
    Pages (from-to)126-139
    Number of pages14
    JournalPowder technology
    Volume341
    DOIs
    Publication statusPublished - Jan 2019

    Fingerprint

    Flow control
    Liquids
    Particle size
    Glass
    Experiments
    Temperature

    Keywords

    • Capillary forces
    • Granulation
    • Rotating drum
    • Scaling
    • Wet granular flow

    Cite this

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    title = "Wet granular flow control through liquid induced cohesion",
    abstract = "Liquid induced cohesion has a significant effect on the flow characteristics of wet granular assemblies. The strength of capillary forces between the particles can be continuously tuned by making the glass beads hydrophobic via chemical silanization. Main results of rotating drum experiments are that stronger liquid-induced cohesion decreases the width of the flowing region, the velocity of the particles at the free surface and the local granular temperature, but in contrast, increases the width of the creeping region as well as the dynamic angle of repose. Our proposed scaling methodology yields invariant bed flow characteristics for different particle sizes in the flow regimes considered (rolling and cascading regimes), and thus allows to control the flow.",
    keywords = "Capillary forces, Granulation, Rotating drum, Scaling, Wet granular flow",
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    Wet granular flow control through liquid induced cohesion. / Jarray, Ahmed; Magnanimo, Vanessa; Luding, Stefan.

    In: Powder technology, Vol. 341, 01.2019, p. 126-139.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Wet granular flow control through liquid induced cohesion

    AU - Jarray, Ahmed

    AU - Magnanimo, Vanessa

    AU - Luding, Stefan

    PY - 2019/1

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    N2 - Liquid induced cohesion has a significant effect on the flow characteristics of wet granular assemblies. The strength of capillary forces between the particles can be continuously tuned by making the glass beads hydrophobic via chemical silanization. Main results of rotating drum experiments are that stronger liquid-induced cohesion decreases the width of the flowing region, the velocity of the particles at the free surface and the local granular temperature, but in contrast, increases the width of the creeping region as well as the dynamic angle of repose. Our proposed scaling methodology yields invariant bed flow characteristics for different particle sizes in the flow regimes considered (rolling and cascading regimes), and thus allows to control the flow.

    AB - Liquid induced cohesion has a significant effect on the flow characteristics of wet granular assemblies. The strength of capillary forces between the particles can be continuously tuned by making the glass beads hydrophobic via chemical silanization. Main results of rotating drum experiments are that stronger liquid-induced cohesion decreases the width of the flowing region, the velocity of the particles at the free surface and the local granular temperature, but in contrast, increases the width of the creeping region as well as the dynamic angle of repose. Our proposed scaling methodology yields invariant bed flow characteristics for different particle sizes in the flow regimes considered (rolling and cascading regimes), and thus allows to control the flow.

    KW - Capillary forces

    KW - Granulation

    KW - Rotating drum

    KW - Scaling

    KW - Wet granular flow

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    U2 - 10.1016/j.powtec.2018.02.045

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