Gas Diffusion in Porous Media

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Science  10 Jul 1959:
Vol. 130, Issue 3367, pp. 100-102
DOI: 10.1126/science.130.3367.100-a


A method has been proposed for deriving a characteristic determining flow in porous systems. This characteristic combines both area and path-length factors used by earlier authors. For a gas, diffusive flow is proportional to the 4/3 power of the gas-filled porosity, and this function has been derived from consideration of the planar distribution of spherical pores and the interaction of two adjacent planes.