@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 -
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