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Title: Permeability analysis in bisized porous media: wall effect between particles of different size
Authors: Dias, Ricardo P.
Fernandes, Carla S.
Teixeira, José A.
Mota, Manuel
Yelshin, Alexander
Keywords: Binary mixture
Particle size ratio
Issue Date: 2008
Publisher: Elsevier
Citation: Dias, Ricardo P.; Fernandes, Carla S.; Teixeira, José A.; Mota, Manuel; Yelshin, Alexander (2008) - Permeability analysis in bisized porous media: wall effect between particles of different size. Journal of Hydrology. ISSN 0022-1694. 349:3-4. 470-474
Abstract: The permeability of binary packings of glass beads with different size ratio – 13.3, 20, and 26.7, was investigated. In the Kozeny–Carman equation, the dependence of the tortuosity s on the mixture porosity e(xD) was described according to s = 1/en for different volume fraction of large particles in the mixture, xD. Obtained data on packing permeability shows that the parameter n is a function of the volume fraction and particle size ratio, with values between 0.5 and 0.4. This can be explained by the wall effect resulting from the arrangement of the small particles occurring near the large particle surface. A model taking in account this effect was suggested that can be useful in the characterization of transport phenomena in granular beds as well as in engineering applications.
Peer review: yes
ISSN: 0022-1694
Appears in Collections:DEMAT - Artigos em Revistas Indexados ao ISI/Scopus

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