Longitudinal permeability determination of dual-scale fibrous materials

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    26 Citations (Scopus)


    In this work, the longitudinal permeability of squarely packed dual-scale fiber preforms is studied theoretically. These fiber preforms are composed of aligned porous tows and the tows are tightly packed. The effective permeability is calculated as a parallel-like network of intra-tow permeability and inter-tow permeability, which are quantified by Darcy's law and the inscribed radius between tows, respectively. The jump velocity at the interface between inter-tow fluids and porous tows is considered, as derived by substituting Beavers and Joseph's correlation into Brinkman's equation. We further examine the effects of intra-tow permeability on the effective permeability of the fibrous system with three interface conditions: (1) interface velocity = 0, (2) interface velocity = mean intra-tow velocity, and (3) interface velocity = jump velocity. The jump-velocity-based model is found to be closest to numerical data. The influence of the fiber volume fraction of tows on the effective permeability is also analyzed.

    Original languageEnglish
    Pages (from-to)42-46
    Number of pages5
    JournalComposites Part A: Applied Science and Manufacturing
    Publication statusPublished - Jan 2015


    • A. Fibers
    • B. Microstructures
    • C. Analytical modeling
    • E. Resin transfer molding (RTM)

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Mechanics of Materials


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