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Hydrodynamics of Drops and Particles...

Chembai Ganesh, Subramaniam,

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Hydrodynamics of Drops and Particles Driven by Marangoni and Diffusiophoretic Forces /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Hydrodynamics of Drops and Particles Driven by Marangoni and Diffusiophoretic Forces // Subramaniam Chembai Ganesh.
Author:	Chembai Ganesh, Subramaniam,
Description:	1 electronic resource (147 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
Contained By:	Dissertations Abstracts International86-03B.
Subject:	Chemical engineering. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31301403
ISBN:	9798384057314

Hydrodynamics of Drops and Particles Driven by Marangoni and Diffusiophoretic Forces /
Chembai Ganesh, Subramaniam,

Hydrodynamics of Drops and Particles Driven by Marangoni and Diffusiophoretic Forces /Subramaniam Chembai Ganesh. - 1 electronic resource (147 pages)

Source: Dissertations Abstracts International, Volume: 86-03, Section: B.

This study investigates the hydrodynamics of particles and drops driven by forces generated by an asymmetrical physical and chemical surrounding environment. In the first part, a novel colloidal motor design driven by surface tension forces is proposed, utilizing an active Janus particle encapsulated in an immiscible liquid drop to form a compound drop/particle. Marangoni forces induced by asymmetric solute adsorption at the liquid-liquid interface of the drop propels the compound system. The propulsion speeds of the motor are analyzed for various relative sizes and configurations of the Janus particle and the encapsulating drop and the effects of varying the transport properties of the suspending and suspended fluid medium are examined. The system demonstrates the ability to generate higher velocities compared to traditional diffusiophoretic Janus particle-based motors. The second part focuses on the thermocapillary migration of spherical drops with stagnant caps of finite thermal conductivity which significantly influences the drop migration and surrounding hydrodynamics. An analytical model for heat conduction in the stagnant cap is developed, and the effects of interfacial stresses on the migration velocity are evaluated. Finally, the interaction between a spherical Janus motor driven by self-diffusiophoresis and an inert cargo particle is explored in an axisymmetric configuration within the Stokes regime. A stream function-based analog to the twin multipole approach is developed to study the dynamics of the motor and the cargo in different configurations. The effects of Janus cap size and particle size ratios on their interactions are investigated, revealing distinct regimes of contact and contactless towing/hovering. Taken together this investigation offers valuable insights into the complexities of motion driven by molecular and interfacial forces, with implications ranging from fundamental understanding to potential applications in commercial multiphase technologies.

English

ISBN: 9798384057314Subjects--Topical Terms:

560457
Chemical engineering.
Subjects--Index Terms:

Active Janus motors

Hydrodynamics of Drops and Particles Driven by Marangoni and Diffusiophoretic Forces /
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100 1 $a Chembai Ganesh, Subramaniam, $e author. $3 3829466
245 1 0 $a Hydrodynamics of Drops and Particles Driven by Marangoni and Diffusiophoretic Forces / $c Subramaniam Chembai Ganesh.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (147 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
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500 $a Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
500 $a Advisors: Maldarelli, Charles Committee members: Koplik, Joel; Morris, Jeffrey; Lee, Taehun; Yariv, Ehud.
502 $b Ph.D. $c The City College of New York $d 2024.
520 $a This study investigates the hydrodynamics of particles and drops driven by forces generated by an asymmetrical physical and chemical surrounding environment. In the first part, a novel colloidal motor design driven by surface tension forces is proposed, utilizing an active Janus particle encapsulated in an immiscible liquid drop to form a compound drop/particle. Marangoni forces induced by asymmetric solute adsorption at the liquid-liquid interface of the drop propels the compound system. The propulsion speeds of the motor are analyzed for various relative sizes and configurations of the Janus particle and the encapsulating drop and the effects of varying the transport properties of the suspending and suspended fluid medium are examined. The system demonstrates the ability to generate higher velocities compared to traditional diffusiophoretic Janus particle-based motors. The second part focuses on the thermocapillary migration of spherical drops with stagnant caps of finite thermal conductivity which significantly influences the drop migration and surrounding hydrodynamics. An analytical model for heat conduction in the stagnant cap is developed, and the effects of interfacial stresses on the migration velocity are evaluated. Finally, the interaction between a spherical Janus motor driven by self-diffusiophoresis and an inert cargo particle is explored in an axisymmetric configuration within the Stokes regime. A stream function-based analog to the twin multipole approach is developed to study the dynamics of the motor and the cargo in different configurations. The effects of Janus cap size and particle size ratios on their interactions are investigated, revealing distinct regimes of contact and contactless towing/hovering. Taken together this investigation offers valuable insights into the complexities of motion driven by molecular and interfacial forces, with implications ranging from fundamental understanding to potential applications in commercial multiphase technologies.
546 $a English
590 $a School code: 1606
650 4 $a Chemical engineering. $3 560457
650 4 $a Physics. $3 516296
650 4 $a Fluid mechanics. $3 528155
653 $a Active Janus motors
653 $a Drops and colloids
653 $a Low Reynolds number hydrodynamics
653 $a Marangoni flow
653 $a Self diffusiophoresis
653 $a Thermocapillary migration
690 $a 0542
690 $a 0204
690 $a 0605
710 2 $a The City College of New York. $b Chemical Engineering. $e degree granting institution. $3 3829467
720 1 $a Maldarelli, Charles $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-03B.
790 $a 1606
791 $a Ph.D.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31301403