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Transport of polydisperse colloids in a saturated fracture with spatially variable aperture

Chrysikopoulos Constantinos, Scott C. James

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URIhttp://purl.tuc.gr/dl/dias/A7D9F28D-166D-4430-935C-5C2786FC365E-
Identifierhttps://doi.org/10.1029/2000WR900048 -
Languageen-
Extent10 pagesen
TitleTransport of polydisperse colloids in a saturated fracture with spatially variable apertureen
CreatorChrysikopoulos Constantinosen
CreatorΧρυσικοπουλος Κωνσταντινοςel
CreatorScott C. Jamesen
Content SummaryA particle tracking model is developed to simulate the transport of variably sized colloids in a fracture with a spatially variable aperture. The aperture of the fracture is treated as a lognormally distributed random variable. The spatial fluctuations of the aperture are described by an exponential autocovariance function. It is assumed that colloids can sorb onto the fracture walls but may not penetrate the rock matrix. Particle advection is governed by the local fracture velocity and diffusion by the Stokes-Einstein equation. Model simulations for various realizations of aperture fluctuations indicate that lognormal colloid size distributions exhibit greater spreading than monodisperse suspensions. Both sorption and spreading of the polydisperse colloids increase with increasing variance in the particle diameter. It is shown that the largest particles are preferentially transported through the fracture leading to early breakthrough while the smallest particles are preferentially sorbed. Increasing the variance of the aperture fluctuations leads to increased tailing for both monodisperse and variably sized colloid suspensions, while increasing the correlation length of the aperture fluctuations leads to increased spreading.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2015-09-19-
Date of Publication2000-
SubjectAlgorithm Developmenten
SubjectFracture Generationen
Bibliographic CitationS. C. James , C. V. Chrysikopoulos ,"Transport of polydisperse colloids in a saturated fracture with spatially variable aperture ",Wat.Resou.Res., vol. 36, no. 6, pp 1457–1465, Jun. 2000.doi :10.1029/2000WR900048 en

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