Multiple liquid-liquid critical points and density anomaly in core-softened potentials

Detalhes bibliográficos
Autor(a) principal: Barbosa, Marco Aurélio Alves
Data de Publicação: 2013
Outros Autores: Torres, Evy Augusto Salcedo, Barbosa, Marcia Cristina Bernardes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/101842
Resumo: The relation between liquid-liquid phase transitions andwaterlike density anomalies in core-softened potentials of fluids was investigated in an exactly solvable one-dimensional lattice model and in a three-dimensional fluid with a Fermi-like potential, the latter by molecular dynamics. Both systems were shown to present three liquid phases, two liquid-liquid phase transitions closely connected to two distinct regions of anomalous density increase. We propose that an oscillatory behavior observed on the thermal expansion coefficient as a function of pressure can be used as a signature of the connection between the liquid-liquid phase transition and density anomaly.
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spelling Barbosa, Marco Aurélio AlvesTorres, Evy Augusto SalcedoBarbosa, Marcia Cristina Bernardes2014-08-26T09:26:22Z20131539-3755http://hdl.handle.net/10183/101842000897742The relation between liquid-liquid phase transitions andwaterlike density anomalies in core-softened potentials of fluids was investigated in an exactly solvable one-dimensional lattice model and in a three-dimensional fluid with a Fermi-like potential, the latter by molecular dynamics. Both systems were shown to present three liquid phases, two liquid-liquid phase transitions closely connected to two distinct regions of anomalous density increase. We propose that an oscillatory behavior observed on the thermal expansion coefficient as a function of pressure can be used as a signature of the connection between the liquid-liquid phase transition and density anomaly.application/pdfengPhysical review. E, Statistical, nonlinear, and soft matter physics. Vol. 87, no. 3 (Mar. 2013), 032303, 5 p.Estrutura líqüidaPontos criticosDensidadeDinâmica molecularExpansão térmicaMultiple liquid-liquid critical points and density anomaly in core-softened potentialsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000897742.pdf000897742.pdfTexto completo (inglês)application/pdf446023http://www.lume.ufrgs.br/bitstream/10183/101842/1/000897742.pdf31c322ea997a5dc4065e02b1da89270aMD51TEXT000897742.pdf.txt000897742.pdf.txtExtracted Texttext/plain20838http://www.lume.ufrgs.br/bitstream/10183/101842/2/000897742.pdf.txtafe2f8049f8227eb2b013bf2d7985715MD52THUMBNAIL000897742.pdf.jpg000897742.pdf.jpgGenerated Thumbnailimage/jpeg2164http://www.lume.ufrgs.br/bitstream/10183/101842/3/000897742.pdf.jpg466d58898f8c77303d660ea284514785MD5310183/1018422024-02-07 05:59:15.810507oai:www.lume.ufrgs.br:10183/101842Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-02-07T07:59:15Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Multiple liquid-liquid critical points and density anomaly in core-softened potentials
title Multiple liquid-liquid critical points and density anomaly in core-softened potentials
spellingShingle Multiple liquid-liquid critical points and density anomaly in core-softened potentials
Barbosa, Marco Aurélio Alves
Estrutura líqüida
Pontos criticos
Densidade
Dinâmica molecular
Expansão térmica
title_short Multiple liquid-liquid critical points and density anomaly in core-softened potentials
title_full Multiple liquid-liquid critical points and density anomaly in core-softened potentials
title_fullStr Multiple liquid-liquid critical points and density anomaly in core-softened potentials
title_full_unstemmed Multiple liquid-liquid critical points and density anomaly in core-softened potentials
title_sort Multiple liquid-liquid critical points and density anomaly in core-softened potentials
author Barbosa, Marco Aurélio Alves
author_facet Barbosa, Marco Aurélio Alves
Torres, Evy Augusto Salcedo
Barbosa, Marcia Cristina Bernardes
author_role author
author2 Torres, Evy Augusto Salcedo
Barbosa, Marcia Cristina Bernardes
author2_role author
author
dc.contributor.author.fl_str_mv Barbosa, Marco Aurélio Alves
Torres, Evy Augusto Salcedo
Barbosa, Marcia Cristina Bernardes
dc.subject.por.fl_str_mv Estrutura líqüida
Pontos criticos
Densidade
Dinâmica molecular
Expansão térmica
topic Estrutura líqüida
Pontos criticos
Densidade
Dinâmica molecular
Expansão térmica
description The relation between liquid-liquid phase transitions andwaterlike density anomalies in core-softened potentials of fluids was investigated in an exactly solvable one-dimensional lattice model and in a three-dimensional fluid with a Fermi-like potential, the latter by molecular dynamics. Both systems were shown to present three liquid phases, two liquid-liquid phase transitions closely connected to two distinct regions of anomalous density increase. We propose that an oscillatory behavior observed on the thermal expansion coefficient as a function of pressure can be used as a signature of the connection between the liquid-liquid phase transition and density anomaly.
publishDate 2013
dc.date.issued.fl_str_mv 2013
dc.date.accessioned.fl_str_mv 2014-08-26T09:26:22Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/101842
dc.identifier.issn.pt_BR.fl_str_mv 1539-3755
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dc.relation.ispartof.pt_BR.fl_str_mv Physical review. E, Statistical, nonlinear, and soft matter physics. Vol. 87, no. 3 (Mar. 2013), 032303, 5 p.
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