HR: 1340h
AN: H23F-1492    [Abstracts]
TI: Experimental Investigation of Acoustically Enhanced Colloid Transport In Water-Saturated Packed Columns
AU: * Thomas, J M
EM: jmthomas@uci.edu
AF: University of California, Irvine, Dept. of Civil and Environmental Engineering University of California, Irvine, Irvine, CA 92697 United States
AU: Chrysikopoulos, C V
EM: gios@upatras.gr
AF: University of California, Irvine, Dept. of Civil and Environmental Engineering University of California, Irvine, Irvine, CA 92697 United States
AU: Chrysikopoulos, C V
EM: gios@upatras.gr
AF: University of Patras, Dept. of Civil Engineering University of Patras, Rio-Patras, 26500 Greece
AB: The effects of acoustic wave propagation on the transport of colloids in saturated porous media was investigated by injecting Uranine (conservative tracer) as well as blue and red polystyrene microspheres (colloids of different diameters; 0.10 and 0.028 μm, respectively) into a column packed with glass beads. Experiments were conducted by maintaining the acoustic pressure at the influent at 23.0 kPa with acoustic frequencies ranging from 30 to 150 Hz. The experimental results suggested that colloid size did not affect the forward and reverse attachment rate coefficients. The acoustic pressure forcing caused an increase in effective interstitial velocity at all frequencies for the conservative tracer and colloids of both sizes, with maximum increase at 70 Hz. Furthermore, acoustics enhanced the dispersion process at all frequencies, with a notable spike at 30 Hz.
DE: 1829 Groundwater hydrology
SC: Hydrology [H]
MN: Fall Meeting 2005