Study on the rheology of a dilute emulsion of surfactant-covered droplets using the level set and closest point methods

Pimenta, Paulo Henrique Neves; Oliveira, Taygoara Felamingo de

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Campo DC	Valor	Idioma
dc.contributor.author	Pimenta, Paulo Henrique Neves	-
dc.contributor.author	Oliveira, Taygoara Felamingo de	-
dc.date.accessioned	2023-11-21T18:52:09Z	-
dc.date.available	2023-11-21T18:52:09Z	-
dc.date.issued	2021-10	-
dc.identifier.citation	PIMENTA, Paulo Henrique Neves; OLIVEIRA, Taygoara Felamingo de. Study on the rheology of a dilute emulsion of surfactant-covered droplets using the level set and closest point methods. Physics of Fluids, [S. l.], v. 33, 103306, 2021. DOI: https://doi.org/10.1063/5.0064729. Disponível em: https://pubs.aip.org/aip/pof/article-abstract/33/10/103306/1064935/Study-on-the-rheology-of-a-dilute-emulsion-of?redirectedFrom=fulltext. Acesso em: 21 nov. 2023.	pt_BR
dc.identifier.uri	http://repositorio2.unb.br/jspui/handle/10482/46887	-
dc.language.iso	eng	pt_BR
dc.publisher	AIP Publishing	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	Study on the rheology of a dilute emulsion of surfactant-covered droplets using the level set and closest point methods	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Reologia	pt_BR
dc.subject.keyword	Dinâmica dos fluidos	pt_BR
dc.subject.keyword	Emulsões	pt_BR
dc.subject.keyword	Surfactantes	pt_BR
dc.identifier.doi	https://doi.org/10.1063/5.0064729	pt_BR
dc.relation.publisherversion	https://pubs.aip.org/aip/pof/article-abstract/33/10/103306/1064935/Study-on-the-rheology-of-a-dilute-emulsion-of?redirectedFrom=fulltext	pt_BR
dc.description.abstract1	In this work, we study the effects of surfactant elasticity (E), coverage factor (X), and Peclet number (Pe) on the droplet shape and emulsion rheology. Our analysis considers a single two-dimensional surfactant-covered droplet in an immiscible liquid submitted to a simple shear flow. The numerical methodology combines the level set, to capture the interface, and the closest point method to solve the surfactant transport equation. We separate the dilute phase contribution to the bulk stress tensor in the capillary stress, associated with the normal stress jump, and the Marangoni stress, related to the stress tangent to the interface. Our results show that E and X affect the droplet shape more intensely than the Pe. On the other hand, Pe directly affects the emulsion’s bulk viscosity. For Pe 1, the capillary viscosity decreases with X, while the Marangoni viscosity grows with X. Such a compensation mechanism allows the increase in the bulk viscosity with X. We also present results for the first normal stress difference.	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-4145-5461	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0003-2957-537X	pt_BR
dc.contributor.affiliation	University of Brasılia, Department of Mechanical Engineering, Laboratory of Energy and Environment	pt_BR
dc.contributor.affiliation	University of Brasılia, Department of Mechanical Engineering, Laboratory of Energy and Environment	pt_BR
dc.description.unidade	Faculdade de Tecnologia (FT)	pt_BR
dc.description.unidade	Departamento de Engenharia Mecânica (FT ENM)	pt_BR
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