Non-isothermal model for nematic spherulite growth

Autores
Abukhdeir, Nasser M.; Soulé, Ezequiel Rodolfo; Rey, Alejandro D.
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A computational study of the growth of two-dimensional nematic spherulites in an isotropic phase was performed using a Landau-de Gennes-type quadrupolar tensor order parameter model for the first-order isotropic/nematic transition of 5CB (pentylcyanobiphenyl). An energy balance, taking anisotropy into account, was derived and incorporated into the time-dependent model. Growth laws were determined for two different spherulite morphologies of the form t n, with and without the inclusion of thermal effects. Results show that incorporation of the thermal energy balance correctly predicts the transition of the growth law exponent from the volume driven regime (n ) 1) to the thermally limited regime (approaching n ) 1/2), agreeing well with experimental observations. An interfacial nematodynamic model is used to gain insight into the interactions that result in the progression of different spherulite growth regimes.
Fil: Abukhdeir, Nasser M.. McGill University; Canadá
Fil: Soulé, Ezequiel Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Rey, Alejandro D.. McGill University; Canadá
Materia
Phase Transition
Latent Heat
Nematic Liquid Crystal
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/67562
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Non-isothermal model for nematic spherulite growthAbukhdeir, Nasser M.Soulé, Ezequiel RodolfoRey, Alejandro D.Phase TransitionLatent HeatNematic Liquid Crystalhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1A computational study of the growth of two-dimensional nematic spherulites in an isotropic phase was performed using a Landau-de Gennes-type quadrupolar tensor order parameter model for the first-order isotropic/nematic transition of 5CB (pentylcyanobiphenyl). An energy balance, taking anisotropy into account, was derived and incorporated into the time-dependent model. Growth laws were determined for two different spherulite morphologies of the form t n, with and without the inclusion of thermal effects. Results show that incorporation of the thermal energy balance correctly predicts the transition of the growth law exponent from the volume driven regime (n ) 1) to the thermally limited regime (approaching n ) 1/2), agreeing well with experimental observations. An interfacial nematodynamic model is used to gain insight into the interactions that result in the progression of different spherulite growth regimes.Fil: Abukhdeir, Nasser M.. McGill University; CanadáFil: Soulé, Ezequiel Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Rey, Alejandro D.. McGill University; CanadáAmerican Chemical Society2008-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/67562Abukhdeir, Nasser M.; Soulé, Ezequiel Rodolfo; Rey, Alejandro D.; Non-isothermal model for nematic spherulite growth; American Chemical Society; Langmuir; 24; 23; 12-2008; 13605-136130743-7463CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/abs/10.1021/la8022216info:eu-repo/semantics/altIdentifier/doi/10.1021/la8022216info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-17T10:45:14Zoai:ri.conicet.gov.ar:11336/67562instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-17 10:45:14.461CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Non-isothermal model for nematic spherulite growth
title Non-isothermal model for nematic spherulite growth
spellingShingle Non-isothermal model for nematic spherulite growth
Abukhdeir, Nasser M.
Phase Transition
Latent Heat
Nematic Liquid Crystal
title_short Non-isothermal model for nematic spherulite growth
title_full Non-isothermal model for nematic spherulite growth
title_fullStr Non-isothermal model for nematic spherulite growth
title_full_unstemmed Non-isothermal model for nematic spherulite growth
title_sort Non-isothermal model for nematic spherulite growth
dc.creator.none.fl_str_mv Abukhdeir, Nasser M.
Soulé, Ezequiel Rodolfo
Rey, Alejandro D.
author Abukhdeir, Nasser M.
author_facet Abukhdeir, Nasser M.
Soulé, Ezequiel Rodolfo
Rey, Alejandro D.
author_role author
author2 Soulé, Ezequiel Rodolfo
Rey, Alejandro D.
author2_role author
author
dc.subject.none.fl_str_mv Phase Transition
Latent Heat
Nematic Liquid Crystal
topic Phase Transition
Latent Heat
Nematic Liquid Crystal
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A computational study of the growth of two-dimensional nematic spherulites in an isotropic phase was performed using a Landau-de Gennes-type quadrupolar tensor order parameter model for the first-order isotropic/nematic transition of 5CB (pentylcyanobiphenyl). An energy balance, taking anisotropy into account, was derived and incorporated into the time-dependent model. Growth laws were determined for two different spherulite morphologies of the form t n, with and without the inclusion of thermal effects. Results show that incorporation of the thermal energy balance correctly predicts the transition of the growth law exponent from the volume driven regime (n ) 1) to the thermally limited regime (approaching n ) 1/2), agreeing well with experimental observations. An interfacial nematodynamic model is used to gain insight into the interactions that result in the progression of different spherulite growth regimes.
Fil: Abukhdeir, Nasser M.. McGill University; Canadá
Fil: Soulé, Ezequiel Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Rey, Alejandro D.. McGill University; Canadá
description A computational study of the growth of two-dimensional nematic spherulites in an isotropic phase was performed using a Landau-de Gennes-type quadrupolar tensor order parameter model for the first-order isotropic/nematic transition of 5CB (pentylcyanobiphenyl). An energy balance, taking anisotropy into account, was derived and incorporated into the time-dependent model. Growth laws were determined for two different spherulite morphologies of the form t n, with and without the inclusion of thermal effects. Results show that incorporation of the thermal energy balance correctly predicts the transition of the growth law exponent from the volume driven regime (n ) 1) to the thermally limited regime (approaching n ) 1/2), agreeing well with experimental observations. An interfacial nematodynamic model is used to gain insight into the interactions that result in the progression of different spherulite growth regimes.
publishDate 2008
dc.date.none.fl_str_mv 2008-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/67562
Abukhdeir, Nasser M.; Soulé, Ezequiel Rodolfo; Rey, Alejandro D.; Non-isothermal model for nematic spherulite growth; American Chemical Society; Langmuir; 24; 23; 12-2008; 13605-13613
0743-7463
CONICET Digital
CONICET
url http://hdl.handle.net/11336/67562
identifier_str_mv Abukhdeir, Nasser M.; Soulé, Ezequiel Rodolfo; Rey, Alejandro D.; Non-isothermal model for nematic spherulite growth; American Chemical Society; Langmuir; 24; 23; 12-2008; 13605-13613
0743-7463
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/abs/10.1021/la8022216
info:eu-repo/semantics/altIdentifier/doi/10.1021/la8022216
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1843605997259587584
score 13.001348

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