Visualization and Modeling of Polystyrol Colloid Transport in a Silicon Micromodel
Thomas Baumann*,a and
Charles J. Werthb
a Institute of Hydrochemistry, Technische Universität München, Marchioninistr. 17, D–81377 Munich, Germany
b Dep. of Civil and Environmental Engineering, University of Illinois, 205 N. Mathews Ave. MC-250, Urbana, IL 61801
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Fig. 1. Experimental setup and scanning electron microscope picture of the homogeneous micromodel.
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Fig. 2. Contour plot of the calculated flow velocities in the homogeneous micromodel at 10 µL h–1. Flow is from left to right; grid spacing is 1µm.
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Fig. 3. Schematic of the parabolic flow profile in the micromodel channel.
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Fig. 4. A composite order image of 691-nm colloids in the homogeneous micromodel. Flow is from left to right at 15 µL h–1. The color code indicates the position of the colloids at time steps 2 s apart.
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Fig. 5. (a) Measured colloid trajectories and (b) an overlay of calculated and measured trajectories for the 1960-nm colloids in the homogeneous micromodel during breakthrough. Flow is from left to right.
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Fig. 6. Schematic of the interaction energy between polystyrol colloids of different size and the micromodel surface.
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Copyright © 2004 by the Soil Science Society of America.
