๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Magnetic relaxation in porous media

โœ Scribed by Kenneth S. Mendelson

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
405 KB
Volume
9
Category
Article
ISSN
0730-725X

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โœฆ Synopsis

Studies of a theoretical model suggest that nuclear magnetic relaxation measurements on porous media will yield only an average pore dimension. The model consists of a random walk on a site percolation lattice with absorbing sites. Over a broad range of porosities, diiusion coeffkients, and surface relaxation rates, the model yields only a single relaxation time. Under conditions of fast diffusion the relaxation time is proportional to the volume-to-surface ratio of the system. Under conditions of slow diffusion the relaxation time appears to depend on a pore dimension. But this dimension cannot easily be related to the pore geometry.

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