DIFFUSION OF FLUIDS IN CONFINED GEOMETRY

被引：15

作者：

MITZITHRAS, A

STRANGE, JH

机构：

[1] Physics Laboratory, University of Kent, Canterbury

来源：

MAGNETIC RESONANCE IMAGING | 1994年 / 12卷 / 02期

关键词：

NMR; LIQUIDS; DIFFUSION; CONFINED GEOMETRY;

D O I：

10.1016/0730-725X(94)91532-6

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Pulsed field gradient NMR measurements of restricted self-diffusion of three nonspecific liquids are reported in wed characterised samples with average pore diameters ranging between 35 Angstrom and 500 Angstrom. Structural information has been obtained in the long-times and small ''wave-vectors'' regime, using an exact analytic solution for the related problem of ''thin'' semi-permeable barriers. Experimental results suggest that the permeability of a porous medium depends on the porosity (connectivity) of the pore space and the molecular size of the self-diffusing molecules.

引用

页码：261 / 263

页数：3

共 7 条

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