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Electrostatic Preclusion of Bubble C...

Hui, Jonathan C.

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Electrostatic Preclusion of Bubble Contact in a Microchannel: A Multiphysics Computational Approach with a Predictive Model on Contact Preclusion of Oversized Bubbles.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Electrostatic Preclusion of Bubble Contact in a Microchannel: A Multiphysics Computational Approach with a Predictive Model on Contact Preclusion of Oversized Bubbles./
作者:	Hui, Jonathan C.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	116 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-04, Section: B.
Contained By:	Dissertations Abstracts International82-04B.
標題:	Fluid mechanics. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28085922
ISBN:	9798678161345

Electrostatic Preclusion of Bubble Contact in a Microchannel: A Multiphysics Computational Approach with a Predictive Model on Contact Preclusion of Oversized Bubbles.
Hui, Jonathan C.

Electrostatic Preclusion of Bubble Contact in a Microchannel: A Multiphysics Computational Approach with a Predictive Model on Contact Preclusion of Oversized Bubbles. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 116 p.

Source: Dissertations Abstracts International, Volume: 82-04, Section: B.

Thesis (Ph.D.)--State University of New York at Binghamton, 2020.

This item must not be sold to any third party vendors.

Due to their naturally occurring prevalence and inherent mixing traits, two-phase flows in confining conduits have gained significant attention in several industrial fields such as hydraulic fracturing, biochemical analysis, and thermal management. As a large bubble flows through a capillary, a liquid film lubrication layer is entrained around the bubble. In low velocity or stationary bubble cases, the thin film can drain resulting in bubble contact due to surface tension. This contact can cause flow blockages, increasing the pressure gradient required to reinitiate or continue flow as well as decreasing mixing or heat transfer rates. Characterizing and controlling the thin film surrounding a bubble can enhance these critical hydrodynamic, transport, and heat transfer traits coveted in a variety of fields.In the first study, we present a multiphysics computational model featuring electrostatic interactions of a charged spherical air bubble interface near a charged cylindrical microchannel containing dilute ions. Necessary conditions are demonstrated for interfacial attraction and repulsion to a solid wall. The findings show maximal attractive behavior occurs with low concentration and high potential of opposite polarity between the interface and wall. The strongest repulsive behavior was observed at low concentration and high potential of like polarity on the bubble interface and channel wall. This model illustrated the morphological deformation of a spherical bubble due to electrostatic interactions, establishing a new equilibrium bubble shape and distance from the channel wall. With this multiphysics model and electrostatic considerations, greater control of bubble morphology can be addressed and studied.In the second study, we present necessary factors for precluding oversized bubble contact to a channel wall using electrostatic interactions to induce interfacial repulsive behavior. This study utilized the developed multiphysics model and repulsive considerations to analyze interfacial behavior for various bubble sizes, electric potential boundary conditions, and surface tension properties. Repulsive behavior was characterized by a new dimensionless ratio through which the onset of contact preclusion and the degree of repulsion can be predicted for a given set of variable inputs. Additionally, if a certain equilibrium thin film thickness is desired, one can use this ratio to estimate the required boundary conditions and input variables. Such characterization can be implemented to enhance hydrodynamic, mixing, and thermal management considerations in consequential application fields.

ISBN: 9798678161345Subjects--Topical Terms:

528155
Fluid mechanics.
Subjects--Index Terms:

Bubble

Electrostatic Preclusion of Bubble Contact in a Microchannel: A Multiphysics Computational Approach with a Predictive Model on Contact Preclusion of Oversized Bubbles.
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245 1 0 $a Electrostatic Preclusion of Bubble Contact in a Microchannel: A Multiphysics Computational Approach with a Predictive Model on Contact Preclusion of Oversized Bubbles.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 116 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-04, Section: B.
500 $a Advisor: Huang, Pong-Yu.
502 $a Thesis (Ph.D.)--State University of New York at Binghamton, 2020.
506 $a This item must not be sold to any third party vendors.
520 $a Due to their naturally occurring prevalence and inherent mixing traits, two-phase flows in confining conduits have gained significant attention in several industrial fields such as hydraulic fracturing, biochemical analysis, and thermal management. As a large bubble flows through a capillary, a liquid film lubrication layer is entrained around the bubble. In low velocity or stationary bubble cases, the thin film can drain resulting in bubble contact due to surface tension. This contact can cause flow blockages, increasing the pressure gradient required to reinitiate or continue flow as well as decreasing mixing or heat transfer rates. Characterizing and controlling the thin film surrounding a bubble can enhance these critical hydrodynamic, transport, and heat transfer traits coveted in a variety of fields.In the first study, we present a multiphysics computational model featuring electrostatic interactions of a charged spherical air bubble interface near a charged cylindrical microchannel containing dilute ions. Necessary conditions are demonstrated for interfacial attraction and repulsion to a solid wall. The findings show maximal attractive behavior occurs with low concentration and high potential of opposite polarity between the interface and wall. The strongest repulsive behavior was observed at low concentration and high potential of like polarity on the bubble interface and channel wall. This model illustrated the morphological deformation of a spherical bubble due to electrostatic interactions, establishing a new equilibrium bubble shape and distance from the channel wall. With this multiphysics model and electrostatic considerations, greater control of bubble morphology can be addressed and studied.In the second study, we present necessary factors for precluding oversized bubble contact to a channel wall using electrostatic interactions to induce interfacial repulsive behavior. This study utilized the developed multiphysics model and repulsive considerations to analyze interfacial behavior for various bubble sizes, electric potential boundary conditions, and surface tension properties. Repulsive behavior was characterized by a new dimensionless ratio through which the onset of contact preclusion and the degree of repulsion can be predicted for a given set of variable inputs. Additionally, if a certain equilibrium thin film thickness is desired, one can use this ratio to estimate the required boundary conditions and input variables. Such characterization can be implemented to enhance hydrodynamic, mixing, and thermal management considerations in consequential application fields.
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650 4 $a Computational physics. $3 3343998
653 $a Bubble
653 $a Electric double layer capacitance
653 $a Electrostatic repulsion
653 $a Multiphysics
653 $a Taylor flow
653 $a Weak formulation
690 $a 0204
690 $a 0548
690 $a 0216
710 2 $a State University of New York at Binghamton. $b Mechanical Engineering. $3 1035655
773 0 $t Dissertations Abstracts International $g 82-04B.
790 $a 0792
791 $a Ph.D.
792 $a 2020
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28085922