Fluids Viscosity Effect on Non-Isothermal Buoyancy-Driven Exchange Flow in Inclined Pipes

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dc.contributor.advisorAlba, Kamran
dc.contributor.committeeMemberSingh, Navdeep
dc.contributor.committeeMemberEl Nahas, Medhat
dc.creatorRavichandran, Gaarthick
dc.date.accessioned2019-12-22T03:47:33Z
dc.date.createdDecember 2019
dc.date.issued2019-12
dc.date.submittedDecember 2019
dc.date.updated2019-12-22T03:47:33Z
dc.description.abstractBuoyancy-driven exchange flow is studied experimentally for different Atwood numbers, inclination angles and fluid pairs. The density difference drives the flow, that is achieved through added salinity for isothermal case and temperature difference for the non-isothermal case. Detailed benchmarking experiments were run for isothermal and non-isothermal cases. The degree of flow instability and mixing was found to increase as the inclination angle moves towards vertical, in both isothermal and non-isothermal experiments. The influence of temperature in the non-isothermal experiments caused a significant increase in the flow instability and diffusion. The rate of fluids interpenetration was measured showing an asymmetry from the observed non-isothermal results. The heavy cold finger advances at a faster rate compared to the light hot fluid finger. This phenomenon was quantified for the full range of inclination angles and Atwood numbers. The effect of temperature-viscosity relation on the dynamics of the flow was studied experimentally. Each fluid phase was viscosified separately, maintaining the same density difference. The viscosities were varied by adding Xanthan gum. The effect of viscosity ratio was quantified by measuring the front velocity of the fluid fingers over the full range of inclination angles. Same density difference was maintained in both isothermal and non-isothermal experiments. The fluids interpenetration rate was maximum for intermediate inclination angles and was observed in both isothermal and non-isothermal (without Xanthan gum) cases. The overall observed asymmetry for visosified experiments was found to be less compared to the non-isothermal experiments (without Xanthan gum) at any given Atwood number.
dc.description.departmentEngineering Technology, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/10657/5637
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.subjectAtwood number
dc.titleFluids Viscosity Effect on Non-Isothermal Buoyancy-Driven Exchange Flow in Inclined Pipes
dc.type.dcmiText
dc.type.genreThesis
local.embargo.lift2021-12-01
local.embargo.terms2021-12-01
thesis.degree.collegeCollege of Technology
thesis.degree.departmentEngineering Technology, Department of
thesis.degree.disciplineEngineering Technology
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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