Persistent Link:
http://hdl.handle.net/10150/191964
Title:
Numerical analysis of the effects of heterogeneities on dispersion
Author:
Gannon, John Michael,1960-
Issue Date:
1987
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The effects of heterogeneities on macrodispersion in porous media were investigated using numerical simulations. Cases involving a single heterogeneity were investigated initially. The size and location of the input source strongly influenced the magnitude of the longitudinal macrodispersion coefficient. A smaller solute input source decreased the longitudinal macrodispersion coefficient when the source was located up gradient from the heterogeneity and was not centered (vertically). A vertical flow component reduced the magnitude of the longitudinal macrodispersion coefficient in all cases, and asymptotic dispersion coefficients were approached at an earlier time than those without vertical flow. Dispersion in stratified porous media was also simulated. Cases involving both a vertical flow component and no vertical flow were studied. The asymptotic longitudinal dispersivity values are in close agreement with stochastic solutions, as long as certain conditions are met. Transient flow conditions were also shown to strongly influence dispersion.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Diffusion in hydrology -- Mathematical models.; Dispersion -- Mathematical models.; Permeability.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Yeh, T.C. Jim

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleNumerical analysis of the effects of heterogeneities on dispersionen_US
dc.creatorGannon, John Michael,1960-en_US
dc.contributor.authorGannon, John Michael,1960-en_US
dc.date.issued1987en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe effects of heterogeneities on macrodispersion in porous media were investigated using numerical simulations. Cases involving a single heterogeneity were investigated initially. The size and location of the input source strongly influenced the magnitude of the longitudinal macrodispersion coefficient. A smaller solute input source decreased the longitudinal macrodispersion coefficient when the source was located up gradient from the heterogeneity and was not centered (vertically). A vertical flow component reduced the magnitude of the longitudinal macrodispersion coefficient in all cases, and asymptotic dispersion coefficients were approached at an earlier time than those without vertical flow. Dispersion in stratified porous media was also simulated. Cases involving both a vertical flow component and no vertical flow were studied. The asymptotic longitudinal dispersivity values are in close agreement with stochastic solutions, as long as certain conditions are met. Transient flow conditions were also shown to strongly influence dispersion.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshDiffusion in hydrology -- Mathematical models.en_US
dc.subject.lcshDispersion -- Mathematical models.en_US
dc.subject.lcshPermeability.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairYeh, T.C. Jimen_US
dc.identifier.oclc213332878en_US
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