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Coarsening of Quasi Two-Dimensional Emulsions Formed by Islands in Free-Standing Smectic Films

  • We study the coarsening behavior of assemblies of islands on smectic A freely suspended films in ISS microgravity experiments. The islands can be regarded as liquid inclusions in a two-dimensional fluid in analogy to liquid droplets of the discontinuous phase of an emulsion. The coarsening is effectuated by two processes, predominantly by island coalescence, but to some extend also by Ostwald ripening, whereby large islands grow at the expense of surrounding smaller ones. A peculiarity of thisWe study the coarsening behavior of assemblies of islands on smectic A freely suspended films in ISS microgravity experiments. The islands can be regarded as liquid inclusions in a two-dimensional fluid in analogy to liquid droplets of the discontinuous phase of an emulsion. The coarsening is effectuated by two processes, predominantly by island coalescence, but to some extend also by Ostwald ripening, whereby large islands grow at the expense of surrounding smaller ones. A peculiarity of this system is that the continuous and the discontinuous phases consist of the same material. We determine the dynamics, analyze the self-similar aging of the island size distribution and discuss characteristic exponents of the mean island growth. Smectic islands on a thin freely suspended smectic film form a quasi two-dimensional emulsion, without a liquid subphase. We describe the coarsening dynamics that involves island coalescence and Ostwald ripening.show moreshow less

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Metadaten
Author:Christoph Klopp, Torsten Trittel, Ralf Stannarius
DOI:https://doi.org/10.1002/cphc.202400166
ISSN:1439-4235
Parent Title (English):CHEMPHYSCHEM
Publisher:Wiley
Document Type:Article
Language:English
Year of Publishing:2024
Date of Publication (online):2024/05/23
Publishing Institution:Technische Hochschule Brandenburg
Release Date:2024/05/24
First Page:1
Last Page:13
Institutes:Fachbereich Technik
University Bibliography:Hochschulbibliografie
Licence (German):Creative Commons - CC BY - Namensnennung 4.0
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