HR: 1340h
AN: H33D-1631    [Abstracts]
TI: Dense, Viscous Brine Transport in Porous Medium Systems
AU: * Pedit, J A
EM: pedit@email.unc.edu
AF: The University of North Carolina at Chapel Hill, CB 7431, 148 Rosenau Hall, Chapel Hill, NC 27599, United States
AU: Johnson, D N
EM: nomad12@email.unc.edu
AF: The University of North Carolina at Chapel Hill, CB 7431, 148 Rosenau Hall, Chapel Hill, NC 27599, United States
AU: Birak, P S
EM: birak@email.unc.edu
AF: The University of North Carolina at Chapel Hill, CB 7431, 148 Rosenau Hall, Chapel Hill, NC 27599, United States
AU: Farthing, M W
EM: matthew_farthing@unc.edu
AF: The University of North Carolina at Chapel Hill, CB 7431, 148 Rosenau Hall, Chapel Hill, NC 27599, United States
AU: Miller, C T
EM: casey_miller@unc.edu
AF: The University of North Carolina at Chapel Hill, CB 7431, 148 Rosenau Hall, Chapel Hill, NC 27599, United States
AB: The use of high concentration brines in the subsurface has been studied for decades with a particular interest in storage of toxic and radioactive wastes. Brine has recently been incorporated into dense nonaqueous phase liquid (DNAPL) remediation strategies and evaluated at the laboratory and field scales. However, many open questions remain regarding the behavior and transport of such brines. We investigate the density and viscosity of a calcium bromide (CaBr₂) brine as a function of mass fraction. We also evaluate dispersion characteristics using two one-dimensional columns packed with porous media that differed in microscale characteristics. Dispersion is observed for systems of varying velocity, density, and travel distance. Using a nonlinear transport model to describe fluid flow and species transport, a high-resolution finite volume discretization is applied to approximate a solution. The solution to the nonlinear transport model is then compared with experimental results.
DE: 1828 Groundwater hydraulics
DE: 1832 Groundwater transport
DE: 1847 Modeling
SC: Hydrology [H]
MN: 2007 Fall Meeting