Modeling of short-time penetration into complex porous structures

D. Bousfield, Martti Toivakka, S. Pellerin

    Research output: Chapter in Book/Conference proceedingConference contributionScientificpeer-review

    4 Citations (Scopus)


    The short-time uptake of a fluid by porous media is important both in coating and printing operations. A new method to predict the short-time absorption into a real pore geometry, taking into account fluid properties, surface forces, and the complex pore geometry, is presented. The porous space is characterized by techniques described in the companion paper (Toivakka and Nyfors, 2000). The flows in the pores that connect to the surface are characterized by a series of hydraulic radii. The viscous resistance in these pore geometries, inertial forces at short times, and the actual contact angles at the advancing front are included. The model calcs. the rate of fluid uptake as a function of time. The model predictions are given for cubic, hexagonal, and random packing of spheres. The results are compared to exptl. values obtained with model coating layers of spherical plastic pigments. The comparison between the exptl. results and the predicted uptake rates into pores generated by random packing of spheres is good.
    Original languageUndefined/Unknown
    Title of host publication2000 Tappi coating conference : proceedings
    Editors TAPPI
    PublisherTAPPI Press
    Number of pages13
    ISBN (Print)9780898529647
    Publication statusPublished - 2000
    MoE publication typeA4 Article in a conference publication
    Eventconference; 2000-05-01; 2000-05-04 - TAPPI Coating Conference
    Duration: 1 May 20004 May 2000


    Conferenceconference; 2000-05-01; 2000-05-04

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