Pore characterization through propagator-resolved transverse relaxation exchange

作     者：K. E. Washburn C. H. Arns P. T. Callaghan 

作者机构：School of Chemical and Physical Sciences Victoria University of Wellington Wellington New Zealand Department of Applied Mathematics Research School of Physical Sciences and Engineering Australian National University Canberra ACT 0200 Australia 

出 版 物：《Physical Review E》 (物理学评论E辑：统计、非线性和软体物理学)

年 卷 期：2008年第77卷第5期

页      面：051203-051203页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

基　　金：Deutsche Forschungsgemeinschaft(HA 4367/3-1, KE 1751/3-1, KR 3684/8-1) Bundesministerium für Wirtschaft und Energie(0327773I) 

主　　题：POROUS-MEDIA DIFFUSION MEASUREMENTS FIELD GRADIENT SPIN ECHOES 

摘      要：We use the propagator-resolved transverse relaxation exchange experiment to characterize the pore space and fluid behavior of water saturated, tight-packed quartz sand. The experiment uses T2 exchange plots to observe the number of molecules that shift their environment for a range of mixing times. The propagator dimension allows us to determine how far the molecules have moved. The peak intensities are integrated and then plotted as a function of displacement and mixing time. We also model our system using both a probabilistic pore-hopping simulation and a spreading Gaussian model. We use the results of these simulations to interpret the peak intensity plots. From this, we can estimate pore features such as characteristic time, pore radii, and interpore spacing. The tortuosity of the different pore sizes can then be calculated from these values.