Modification to Darcy Model for High Pressure and High Velocity Applications and Associated Mixed Finite Element Formulations

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dc.contributor.advisorNakshatrala, Kalyana Babu
dc.contributor.committeeMemberWillam, Kaspar J.
dc.contributor.committeeMemberWang, Keh-Han
dc.contributor.committeeMemberMetcalfe, Ralph W.
dc.creatorChang, Justin
dc.date.accessioned2015-08-22T03:19:56Z
dc.date.available2015-08-22T03:19:56Z
dc.date.createdMay 2013
dc.date.issued2013-05
dc.date.updated2015-08-22T03:19:56Z
dc.description.abstractThe Darcy model is based on a plethora of assumptions. One of the most important assumptions is that the Darcy model assumes the drag coefficient to be constant. However, there is irrefutable experimental evidence that viscosities of organic liquids and carbon-dioxide depend on the pressure. Experiments have also shown that the drag varies nonlinearly with respect to the velocity at high flow rates. In important technological applications like enhanced oil recovery and geological carbon-dioxide sequestration, one encounters both high pressures and high flow rates. It should be emphasized that flow characteristics and pressure variation under varying drag are both quantitatively and qualitatively different from that of constant drag. Motivated by experimental evidence, we consider the drag coefficient to depend on both the pressure and velocity. We consider two major modifications to the Darcy model based on the Barus formula and Forchheimer approximation. The proposed modifications to the Darcy model result in nonlinear partial differential equations, which are not amenable to analytical solutions. To this end, we present mixed finite element formulations based on least-squares formalism and variational multiscale formalism for the resulting governing equations. The proposed modifications to the Darcy model and its associated finite element formulations are used to solve realistic problems with relevance to enhanced oil recovery.
dc.description.departmentCivil and Environmental Engineering, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/10657/980
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectFinite element
dc.subjectComputational fluid dynamics
dc.subjectComputational mechanics
dc.subjectDarcy's law
dc.subjectForchheimer
dc.subjectLeast-squares formalism
dc.subjectVariational multi-scale formalism
dc.subjectBarus
dc.subjectPorous media
dc.subjectPorous materials
dc.subject.lcshCivil engineering
dc.titleModification to Darcy Model for High Pressure and High Velocity Applications and Associated Mixed Finite Element Formulations
dc.type.dcmiText
dc.type.genreThesis
thesis.degree.collegeCullen College of Engineering
thesis.degree.departmentCivil and Environmental Engineering, Department of
thesis.degree.disciplineCivil Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science in Civil Engineering

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