Graduation Semester and Year
2017
Language
English
Document Type
Thesis
Degree Name
Master of Science in Mechanical Engineering
Department
Mechanical and Aerospace Engineering
First Advisor
Hyejin Moon
Abstract
Marangoni convection is a flow resulting from a surface tension gradient at air/liquid interface caused by temperature gradient, concentration of surfactant or applied electric field. Marangoni convection when caused by temperature gradient is also known as thermo-capillary effect. A microgravity condition presents an ideal case to study this phenomenon, since interfacial forces are dominant over body forces. Hence Marangoni convection inside the micro-droplet was studied both numerically and experimentally. The potential application at micro-scale includes particle separation, chaotic mixing inside the droplet and possible enhancement in liquid liquid extraction. To explore these application, firstly flow field inside a droplet was studied by imposing variety of surface tension gradient. Secondly a comparative numerical study of mixing inside a droplet was done for pure diffusive and convective diffusive mixing cases, to evaluate the efficiency of Marangoni convection in mixing. Next, a biphasic system of oil droplet rising in an aqueous phase was modeled to study effect of convection on liquid liquid extraction. Finally a biphasic system to study effect of Marangoni convection on liquid liquid extraction was modeled.
Keywords
Marangoni convection, Liquid-liquid extraction, Two phase modeling, Particle separation, Chaotic mixing, Microdroplets
Disciplines
Aerospace Engineering | Engineering | Mechanical Engineering
License
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 4.0 International License.
Recommended Citation
Sabane, Viraj Parag, "NUMERICAL STUDY OF MARANGONI CONVECTION AND MASS TRANSPORT IN MICRODROPLETS" (2017). Mechanical and Aerospace Engineering Theses. 905.
https://mavmatrix.uta.edu/mechaerospace_theses/905
Comments
Degree granted by The University of Texas at Arlington