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Dissertation/Thesis Abstract

Marangoni Flows: Computation and Experiments
by Temprano-Coleto, Fernando, M.S., University of California, Santa Barbara, 2018, 67; 13423647
Abstract (Summary)

This thesis presents two different efforts in the study of fluid flows with surfactants. The first one is computational: a numerical method for the fully coupled problem of incompressible flow with soluble surfactant. The accurate numerical solution of this problem is highly challenging, and therefore high-end numerical techniques have been used. The approach is based on adaptive Quad/Octree cartesian grids, while the irregular fluid interface is represented implicitly via a level-set formulation. The method is also tested against several benchmarks. The second effort is experimental: the observation of maze-solving behavior by surfactants, which highlights the importance of geometry in Marangoni free-surface flows. This phenomenon is unexpected due to the selective spreading of the surfactant, which eludes incursions in dead-end channels. We postulate a plausible mechanism for the observed behavior, based on the interplay between the added and the endogenous surfactants at the interface.

Indexing (document details)
Advisor: Luzzatto-Fegiz, Paolo, Gibou, Frédéric
Commitee: Mezić, Igor
School: University of California, Santa Barbara
Department: Mechanical Engineering
School Location: United States -- California
Source: MAI 58/04M(E), Masters Abstracts International
Subjects: Applied Mathematics, Mechanical engineering
Keywords: Level-set, Marangoni flows, Maze, Quad/Oc-tree, Surface tension effects, Surfactants
Publication Number: 13423647
ISBN: 978-0-438-89862-2
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