Determination of an effective pore dimension for microporous media

Martin Victor V Johansson (1) , Fabrice Testa (1) , Pierre Perrier (1) , Jérôme Vicente (1) , Jean Philippe Bonnet (2) , Philippe Moulin (2) , Irina Martin Graur (1)

1 IUSTI - Institut universitaire des systèmes thermiques industriels
2 M2P2 - Laboratoire de Mécanique, Modélisation et Procédés Propres

The transient method of the mass flow rate and permeability measurements through a microporous media, developed previously, is used here to extract different characteristics of the media. By implementing the model of porous media as a bundle of capillaries the effective pore dimension is extracted from the measurements, and its physical interpretation is given. This methodology shows promising results to be used as a non-destructive method of micro-and-nanoporous media analysis. The permeability is also extracted directly from the measurements of the pressure variation in time. By using additional information about the sample porosity, the number of capillaries, the tortuosity and the internal surface of the sample are calculated. The extracted values are very close to that obtained by the mercury porosimetry and by microtomography.

Domains: Engineering Sciences [physics]; Reactive fluid environment; Engineering Sciences [physics]; Mechanics [physics.med-ph]; Fluids mechanics [physics.class-ph]

Martin Victor V Johansson, Fabrice Testa, Pierre Perrier, Jérôme Vicente, Jean Philippe Bonnet, et al.. Determination of an effective pore dimension for microporous media. International Journal of Heat and Mass Transfer, 2019, 142, pp.118412. ⟨10.1016/j.ijheatmasstransfer.2019.07.062⟩. ⟨hal-02196396⟩