Nuclear magnetic resonance (NMR) imaging techniques were investigated
as a means to obtain velocity field measurements for the verification
of a stochastic transport theory. A modified stimulated-echo pulse seq
uence was used to make velocity images in an aperiodic heterogeneous p
orous medium. Construction of the velocity covariance from measurement
s of the fluctuating velocity has demonstrated that nuclear magnetic r
esonance imaging is a valuable tool for obtaining experimental data fo
r the examination of existing stochastic transport theory. (C) 1998 El
sevier Science Inc.