Abstract
Those properties of porous media that can be deduced from experiments using measurements of superfluid 1st, 2nd, 4th, and 3rd sound are discussed; the transferability of these results to other transport experiments, especially the acoustic properties of porous media saturated with Newtonian fluids, is also explored. Many of the relevant geometrical parameters are those that arise in a canonical electrical conductivity problem in which the porous solid is insulating, the pore fluid is conducting, and there is an additional surface conductivity lining the walls of the pore space. The most important geometrical parameters are the three‐dimensional tortuosity of the pore space, α2 the two‐dimensional tortuosity of the pore/grain interface, α2, and ʌ, which is a well‐defined measure of dynamically connected pore sizes.
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