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Lattice gas analysis of liquid front in non-crimp fabrics
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-1033-0244
University of Latvia.
2010 (English)In: Transport in Porous Media, ISSN 0169-3913, E-ISSN 1573-1634, Vol. 84, no 1, p. 75-93Article in journal (Refereed) Published
Abstract [en]

The liquid flow front during impregnation of non-crimp fabrics is considered. Irregularities in fibre bundle architecture lead to generation of bubbles at this front. The velocity of this interface is highly influenced by capillary forces mainly caused by the small fibres inside the bundles. In order to better understand which shapes the liquid front takes up at different conditions, a lattice gas model has been applied. First, the macroscopic properties of the solved gas in the liquid are discussed. Next, bubble inclusions are analyzed as to liquid-gas interface position and concentrations of minor component in each phase. The capillary effects at the fluid front are studied for systems both with and without gaps between the bundles. The flow in the interior of the fibre bundles is scrutinized, as well, by also considering the viscous stresses. The flow through unidirectional fabrics is considered by a one-dimensional model, which suggests that the liquid front inside bundles and gaps moves with the same speed when the liquid front inside the bundle has to catch up with the liquid front in the gap

Place, publisher, year, edition, pages
2010. Vol. 84, no 1, p. 75-93
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-9051DOI: 10.1007/s11242-009-9485-zISI: 000280406200004Scopus ID: 2-s2.0-77955055025Local ID: 79d04910-af63-11de-8293-000ea68e967bOAI: oai:DiVA.org:ltu-9051DiVA, id: diva2:981989
Note
Validerad; 2010; 20091002 (stlu)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Frishfelds, VilnisLundström, Staffan

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