Summary
«Directional Permeability» of anisotropic porous media to homogeneous fluids can be defined in two fashions: Firstly, by cutting a pencil shaped piece out of the porous medium and measuring its permability, secondly, by referringDarcy’s law to that component of the seepage velocity which is parallel to the pressure gradient. It is shown that, although these two definitions are not identical, the difference between them is so small that it can usually be neglected.
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References
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Additional information
Dr.A. E. Scheidegger, Dominion Observatory,Ottawa (Canada).
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Scheidegger, A.E. On directional permeability. Geofisica Pura e Applicata 33, 111–113 (1956). https://doi.org/10.1007/BF02629951
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DOI: https://doi.org/10.1007/BF02629951