Normal and oblique drop impact of yield stress fluids with thixotropic effects
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1017/jfm.2019.541 http://hdl.handle.net/11449/185988 |
Resumo: | Normal and oblique drop impact on a solid surface is numerically analysed for yield stress fluids. A rich diversity of results are generated as a consequence of the exploration of the inertial, elastic, plastic and thixotropic features of the process, as well as the inclination of the solid surface. We show that drops of more thixotropic fluids have a higher tendency to bounce in the normal impact, and to roll or to bounce in the case of an oblique drop impact. Concerning elasticity, we found a critical value for the elastic Ohnesorge number above which no bouncing takes place. Experimental findings such as the fact that the stored energy due to the elasticity of the fluid drop plays a role similar to the stored energy of an interfacial nature in inelastic fluid drops are corroborated in the present study. |
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Normal and oblique drop impact of yield stress fluids with thixotropic effectsdropsnon-Newtonian flowsinterfacial flows (free surface)Normal and oblique drop impact on a solid surface is numerically analysed for yield stress fluids. A rich diversity of results are generated as a consequence of the exploration of the inertial, elastic, plastic and thixotropic features of the process, as well as the inclination of the solid surface. We show that drops of more thixotropic fluids have a higher tendency to bounce in the normal impact, and to roll or to bounce in the case of an oblique drop impact. Concerning elasticity, we found a critical value for the elastic Ohnesorge number above which no bouncing takes place. Experimental findings such as the fact that the stored energy due to the elasticity of the fluid drop plays a role similar to the stored energy of an interfacial nature in inelastic fluid drops are corroborated in the present study.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Estadual Paulista, Dept Matemat & Comp, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP, BrazilUniv Fed Rio de Janeiro, Dept Mech Engn, Ctr Tecnol, COPPE,Ilha do Fundao, BR-24210240 Rio De Janeiro, RJ, BrazilUniv Estadual Paulista, Dept Matemat & Comp, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP, BrazilFAPESP: 2013/07375-0CNPq: 309004/2014-4Cambridge Univ PressUniversidade Estadual Paulista (Unesp)Universidade Federal do Rio de Janeiro (UFRJ)Oishi, Cassio M. [UNESP]Thompson, Roney L.Martins, Fernando P. [UNESP]2019-10-04T12:40:22Z2019-10-04T12:40:22Z2019-10-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article642-679http://dx.doi.org/10.1017/jfm.2019.541Journal Of Fluid Mechanics. New York: Cambridge Univ Press, v. 876, p. 642-679, 2019.0022-1120http://hdl.handle.net/11449/18598810.1017/jfm.2019.541WOS:000478866000001Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Fluid Mechanicsinfo:eu-repo/semantics/openAccess2024-06-19T14:32:06Zoai:repositorio.unesp.br:11449/185988Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-06-19T14:32:06Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Normal and oblique drop impact of yield stress fluids with thixotropic effects |
title |
Normal and oblique drop impact of yield stress fluids with thixotropic effects |
spellingShingle |
Normal and oblique drop impact of yield stress fluids with thixotropic effects Oishi, Cassio M. [UNESP] drops non-Newtonian flows interfacial flows (free surface) |
title_short |
Normal and oblique drop impact of yield stress fluids with thixotropic effects |
title_full |
Normal and oblique drop impact of yield stress fluids with thixotropic effects |
title_fullStr |
Normal and oblique drop impact of yield stress fluids with thixotropic effects |
title_full_unstemmed |
Normal and oblique drop impact of yield stress fluids with thixotropic effects |
title_sort |
Normal and oblique drop impact of yield stress fluids with thixotropic effects |
author |
Oishi, Cassio M. [UNESP] |
author_facet |
Oishi, Cassio M. [UNESP] Thompson, Roney L. Martins, Fernando P. [UNESP] |
author_role |
author |
author2 |
Thompson, Roney L. Martins, Fernando P. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal do Rio de Janeiro (UFRJ) |
dc.contributor.author.fl_str_mv |
Oishi, Cassio M. [UNESP] Thompson, Roney L. Martins, Fernando P. [UNESP] |
dc.subject.por.fl_str_mv |
drops non-Newtonian flows interfacial flows (free surface) |
topic |
drops non-Newtonian flows interfacial flows (free surface) |
description |
Normal and oblique drop impact on a solid surface is numerically analysed for yield stress fluids. A rich diversity of results are generated as a consequence of the exploration of the inertial, elastic, plastic and thixotropic features of the process, as well as the inclination of the solid surface. We show that drops of more thixotropic fluids have a higher tendency to bounce in the normal impact, and to roll or to bounce in the case of an oblique drop impact. Concerning elasticity, we found a critical value for the elastic Ohnesorge number above which no bouncing takes place. Experimental findings such as the fact that the stored energy due to the elasticity of the fluid drop plays a role similar to the stored energy of an interfacial nature in inelastic fluid drops are corroborated in the present study. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-04T12:40:22Z 2019-10-04T12:40:22Z 2019-10-10 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1017/jfm.2019.541 Journal Of Fluid Mechanics. New York: Cambridge Univ Press, v. 876, p. 642-679, 2019. 0022-1120 http://hdl.handle.net/11449/185988 10.1017/jfm.2019.541 WOS:000478866000001 |
url |
http://dx.doi.org/10.1017/jfm.2019.541 http://hdl.handle.net/11449/185988 |
identifier_str_mv |
Journal Of Fluid Mechanics. New York: Cambridge Univ Press, v. 876, p. 642-679, 2019. 0022-1120 10.1017/jfm.2019.541 WOS:000478866000001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Fluid Mechanics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
642-679 |
dc.publisher.none.fl_str_mv |
Cambridge Univ Press |
publisher.none.fl_str_mv |
Cambridge Univ Press |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803045545865904128 |