Type
Text
Type
Dissertation
Advisor
Ladeinde, Foluso | Cubaud, Thomas | Brouzes, Eric. | Longtin, Jon
Date
2014-12-01
Keywords
Mechanical engineering | bubble, carbon dioxide, dissolution, microbubble, microfluidics, multiphase flow
Department
Department of Mechanical Engineering.
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/76453
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
The motion and dissolution of bubbles in confined microgeometries is of pivotal importance for many natural and industrial flow processes such as microchemical systems and the development of models for unveiling the fundamentals of oil recovery in porous-like media. In this thesis, we experimentally study the formation, morphology, dynamics and mass transfer of bubbles flowing through a liquid in a microchannel with a particular emphasis on the behavior and dissolution of CO2 micro-bubbles in high viscosity oils. A significant part of the thesis addresses the initial dynamical behavior of dissolving CO2 monodisperse micro-bubbles in numerous solvents (water, silicone oils, alcohols, alkanes) over a range of flow rates and pressure conditions. The effective mass diffusion flux across the bubble interface is measured by tracking individual bubbles and monitoring their shape as they shrink. The initial steady mass flux is characterized using a practical dissolution coefficient that is shown to depend on the fluids physicochemical properties. Our findings show the possibility to control and exploit the interplay between capillary and mass transfer phenomena in small-scale systems. We also tackle the generation of periodic trains of monodisperse bubbles at the hydrodynamic focusing section of a square microchannel, underlining the hydrodynamics resulting in the bubble breakup under various flow conditions. Finally, we investigate the flow of bubbles in complex microgeometries at large capillary numbers, highlighting the rich variety of flow morphology attainable. | 149 pages
Recommended Citation
Sauzade, Martin, "Motion of Bubbles in Confined Microgeometries: Flow Behavior and CO2 Dissolution Regimes" (2014). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 2373.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/2373