Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Capillary bundle model for the computation of the apparent permeability from pore size distributions
A simplified model based on capillary bundle aimed at computing the intrinsic and the apparent permeabilities of mortar to gas is presented. At the micro-level of capillaries, fluid flow follows the classical Poiseuille’s law combined with Knudsen’s flow. At the macro-level, the equation governing fluid flow is very similar to Klinkenberg’s model, and exhibits a dependence of the apparent permeability to the mean pressure. The input data entering in the analytical model are the pore size distributions directly measured from mercury intrusion porosimetry cut above a threshold diameter in order to avoid the overestimation of the permeability inherent to the bundle model. The model is fitted on experimental data on mortar specimens subjected to damage due to electrical fracturing and a tortuosity factor is identified. Fits on the same material with different states of damage show that the tortuosity decreases as damage progresses.
Capillary bundle model for the computation of the apparent permeability from pore size distributions
A simplified model based on capillary bundle aimed at computing the intrinsic and the apparent permeabilities of mortar to gas is presented. At the micro-level of capillaries, fluid flow follows the classical Poiseuille’s law combined with Knudsen’s flow. At the macro-level, the equation governing fluid flow is very similar to Klinkenberg’s model, and exhibits a dependence of the apparent permeability to the mean pressure. The input data entering in the analytical model are the pore size distributions directly measured from mercury intrusion porosimetry cut above a threshold diameter in order to avoid the overestimation of the permeability inherent to the bundle model. The model is fitted on experimental data on mortar specimens subjected to damage due to electrical fracturing and a tortuosity factor is identified. Fits on the same material with different states of damage show that the tortuosity decreases as damage progresses.
Capillary bundle model for the computation of the apparent permeability from pore size distributions
Khaddour, Fadi (Autor:in) / Grégoire, David (Autor:in) / Pijaudier-Cabot, Gilles (Autor:in)
European Journal of Environmental and Civil Engineering ; 19 ; 168-183
07.02.2015
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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