Theory of diffusion in a porous medium with applications to pulsed-field-gradient NMR

David J. Bergman, Keh Jim Dunn

Research output: Contribution to journalArticlepeer-review

Abstract

A Fourier approach is applied for calculating the pulsed-field-gradient-spin-echo amplitude M(k,t) of a fluid in a porous medium with a periodic microgeometry. The method is most effective for long times t, but works quite well down to times that are short enough so that asymptotic short-time approximations of the diffusion process are still valid. The method can be applied regardless of the value of the porosity or the shape of the periodic pore space. Preliminary results are presented for simple cubic arrays of spherical obstacles in a fluid.

Original languageEnglish
Pages (from-to)9153-9156
Number of pages4
JournalPhysical Review B-Condensed Matter
Volume50
Issue number13
DOIs
StatePublished - 1994
Externally publishedYes

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