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@article{Boon:2016:10.1016/j.advwatres.2016.07.020,
author = {Boon, M and Bijeljic, B and Niu, B and Krevor, S},
doi = {10.1016/j.advwatres.2016.07.020},
journal = {Advances in Water Resources},
pages = {266--281},
title = {Observations of 3-D transverse dispersion and dilution in natural consolidated rock by X-ray tomography},
url = {http://dx.doi.org/10.1016/j.advwatres.2016.07.020},
volume = {96},
year = {2016}
}
TY - JOUR
AB - Recent studies have demonstrated the importance of transverse dispersion for dilution and mixing of solutes but most observations have remained limited to two-dimensional sand-box models. We present a new core-flood test to characterize solute transport in 3-D natural-rock media. A device consisting of three annular regions was used for fluid injection into a cylindrical rock core. Pure water was injected into the center and outer region and a NaI solution into the middle region. Steady state transverse dispersion of NaI was visualized with an X-ray medical CT-scanner for a range of Peclét numbers. Three methods were used to calculate Dt: (1) fitting an analytical solution, (2) analyzing the second-central moment, and (3) analyzing the dilution index and reactor ratio. Transverse dispersion decreased with distance due to flow focusing. Furthermore, Dt in the power-law regime showed sub-linear behavior. Overall, the reactor ratios were high confirming the homogeneity of Berea sandstone.
AU - Boon,M
AU - Bijeljic,B
AU - Niu,B
AU - Krevor,S
DO - 10.1016/j.advwatres.2016.07.020
EP - 281
PY - 2016///
SN - 0309-1708
SP - 266
TI - Observations of 3-D transverse dispersion and dilution in natural consolidated rock by X-ray tomography
T2 - Advances in Water Resources
UR - http://dx.doi.org/10.1016/j.advwatres.2016.07.020
UR - http://hdl.handle.net/10044/1/39070
VL - 96
ER -