2004
DOI: 10.1029/2003wr002800
|View full text |Cite
|
Sign up to set email alerts
|

Pore‐scale processes that control dispersion of colloids in saturated porous media

Abstract: [1] Colloidal dispersion in porous media is a consequence of the different paths and velocities experienced by the colloids. We examined at the pore scale the effect of particle and pore size on colloid dispersion using water-saturated micromodels. The micromodels were produced with polydimethylsiloxane (PDMS), using a soft photolithography technique that allows creating transparent patterns that have dimensions in the range of those existing at the pore space. Four sizes of colloids were transported at severa… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

5
131
2

Year Published

2011
2011
2021
2021

Publication Types

Select...
7
2

Relationship

0
9

Authors

Journals

citations
Cited by 166 publications
(138 citation statements)
references
References 50 publications
5
131
2
Order By: Relevance
“…These contradictory findings are probably due to the very limited number of experimental data used, and the experimental conditions that led to significant mass retention caused by straining and/or attachment. The velocity enhancement of colloid particles, which is often observed in studies of colloid and biocolloid transport in fractures and micromodels, is commonly attributed to colloid exclusion from the lower-velocity regions [James and Chrysikopoulos, 2003;Auset and Keller, 2004]. However, in porous media, in addition to colloid exclusion from the lower-velocity regions [Scheibe and Wood, 2003], colloid particles experience a substantial reduction of the effective porosity [Morley et al, 1998], as illustrated in Figure 5.…”
Section: 1002/2014wr016094mentioning
confidence: 99%
“…These contradictory findings are probably due to the very limited number of experimental data used, and the experimental conditions that led to significant mass retention caused by straining and/or attachment. The velocity enhancement of colloid particles, which is often observed in studies of colloid and biocolloid transport in fractures and micromodels, is commonly attributed to colloid exclusion from the lower-velocity regions [James and Chrysikopoulos, 2003;Auset and Keller, 2004]. However, in porous media, in addition to colloid exclusion from the lower-velocity regions [Scheibe and Wood, 2003], colloid particles experience a substantial reduction of the effective porosity [Morley et al, 1998], as illustrated in Figure 5.…”
Section: 1002/2014wr016094mentioning
confidence: 99%
“…The outer channels act as references to calibrate the relationship between particle velocity and fluid velocity. As shown in previous experiments [32][33][34], the average particle speed within thin rectangular channels typically deviates significantly from the average fluid velocity, depending on the particle diameter, the height of the channel and the particles' gravitational height [35,36]. However, the mean fluid velocityv and mean particle velocityū in a channel are proportional [37], so thatv = c dū .…”
Section: Experimental Methodsmentioning
confidence: 99%
“…This leads to faster transport of larger colloids through constricted regions since their centre of mass is further away from the matrix surfaces (Auset and Keller 2004). Additionally, hard core repulsion leads to the displacement of particles perpendicular to streamlines (streamline crossing), which breaks the time-reversibility of particle trajectories even in the Stokes limit (Loutherback et al 2009).…”
Section: Particle Transport In Porous Structuresmentioning
confidence: 99%