HR: 12:05h
AN: H42C-08    [Abstracts]
TI: Numerical and Experimental Investigation on the Mobilization of Residual NAPL by Seismic Waves
AU: * Hsu, S
EM: syhsu@jhu.edu
AF: Johns Hopkins University, Department of Geography and Environmental Engineering, 313 Ames Hall, 3400 North Charles Street, Baltimore, MD 21218, United States
AU: Hilpert, M
EM: Markus_Hilpert@jhu.edu
AF: Johns Hopkins University, Department of Geography and Environmental Engineering, 313 Ames Hall, 3400 North Charles Street, Baltimore, MD 21218, United States
AB: Applying seismic waves might improve the efficiency of conventional pump-and-treat technologies for cleaning up aquifers contaminated by nonaqueous phase liquids (NAPL). We investigate the hypothesis that the mobilization of trapped NAPL blobs can be enhanced by exploiting capillary-induced resonance. We have developed a theory that allows us to estimate the response of a trapped NAPL blob to variable frequency excitation including its resonant frequency. Physical experiments to image the response of blobs to seismic waves in single pore channels and sphere packings at a high spatial and temporal resolution are under way. To obtain an unobstructed view of the blobs we match the optical refraction indices of the liquids and the solid phase and illuminate the porous medium with a laser light sheet. Finally, 3D Lattice-Boltzmann simulations will be used to demonstrate that a trapped NAPL blob in a porous medium exhibits resonance.
DE: 0792 Contaminants (0432)
DE: 1829 Groundwater hydrology
DE: 1832 Groundwater transport
DE: 1847 Modeling
SC: Hydrology [H]
MN: 2007 Fall Meeting