6-DIMENSIONAL SPIN DENSITY VELOCITY NMR MICROSCOPY OF PERCOLATION CLUSTERS/

Using computer-simulated random-site percolation networks as templates , three-dimensional percolation cluster objects were fabricated, The p ore space was filled with water and experimentally investigated with t he aid of NMR microimaging. A pulse sequence for six-dimensional spin density/velocity NMR imaging was employed for the combined record of t he three-dimensional spin-density distribution and the three-dimension al velocity vector field of water percolating through the pore space, An evaluation procedure for the NMR image data was established that re liably renders the characteristic parameters (fractal dimensionality, fractal dimensionality of the backbone, correlation length). Copyright (C) 1996 Elsevier Science Inc.