Viscous Fingering and Static/Dynamic Heterogeneity Induced Instabilities in Porous Media

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dc.contributor.advisorAzaiez, Jalel
dc.contributor.authorSajjadi, Mozhdeh
dc.date.accessioned2015-09-28T17:31:01Z
dc.date.embargolift2016-03-26T17:31:01Z
dc.date.issued2015-09-28
dc.date.submitted2015en
dc.description.abstractThis dissertation addresses different aspects of flow instability in non-isothermal miscible displacements through media with static and dynamic permeability distributions. The research is conducted in three steps. In the first step non-isothermal flows in homogeneous media are studied by numerical simulation of the displacement process in a Hele-Shaw cell. The results show that the stability of the process highly depends on the strength of interactions between the two fronts determined by the thermal lag coefficient. The relative rate of diffusion of heat in the medium can magnify the effect of lag between the two fronts or compensate for it depending on the considered scenario. Miscible displacements with adverse mobility ratios are analyzed in the second part of this study for layered heterogeneous media. The effects of the flow parameters and the heterogeneity characteristics of the domain are examined. Qualitative and quantitative analysis of the results lead to characterization and unification of four distinct regimes that govern the flow displacement for different parameters. The unification allows to distinguish between the flows in which the instability is dominated by heterogeneity and those with viscous fingering dominant instability. Finally in the last two chapters of this dissertation, the changes in the porosity and permeability in melting porous media are modeled. The effects of the melting arameters on the amount of melted material and the rate of melting are analyzed. In addition, the heat transfer mechanisms in presence of the bypassing flow around frozen blocks of different geometries are analyzed and their melting rates are unified based on the shape factor and initial porosity of the block. In study of the flow displacements prone to instability, the dominant mechanisms that affect the growth and patterns of instability for different melting parameter values are recognized and their contribution to enhancement or attenuation of fingers are determined analytically. The study shows that instabilities in general enhance melting but the enhancement is limited for displacements with small melting potentials.en_US
dc.description.embargoterms6 monthsen_US
dc.identifier.citationSajjadi, M. (2015). Viscous Fingering and Static/Dynamic Heterogeneity Induced Instabilities in Porous Media (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/28644en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/28644
dc.identifier.urihttp://hdl.handle.net/11023/2523
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectEngineering--Chemical
dc.subjectEngineering--Mechanical
dc.subjectEngineering--Petroleum
dc.subject.classificationViscous Fingeringen_US
dc.subject.classificationHeterogeneous Mediaen_US
dc.subject.classificationMeltingen_US
dc.subject.classificationDynamic Heterogeneityen_US
dc.subject.classificationNon-isothermalen_US
dc.subject.classificationMiscible Displacementen_US
dc.subject.classificationHydrodynamic Instabilityen_US
dc.subject.classificationPorous Mediaen_US
dc.subject.classificationUnder-saturateden_US
dc.titleViscous Fingering and Static/Dynamic Heterogeneity Induced Instabilities in Porous Media
dc.typedoctoral thesis
thesis.degree.disciplineChemical and Petroleum Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameDoctor of Philosophy (PhD)
ucalgary.item.requestcopytrue
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