Thermodynamic and dynamic anomalies for a three-dimensional isotropic core-softened potential
Autor(a) principal: | |
---|---|
Data de Publicação: | 2006 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/205015 |
Resumo: | Using molecular-dynamics simulations and integral equations (Rogers-Young, Percus-Yevick, and hypernetted chain closures) we investigate the thermodynamics of particles interacting with continuous core-softened intermolecular potential. Dynamic properties are also analyzed by the simulations. We show that, for a chosen shape of the potential, the density, at constant pressure, has a maximum for a certain temperature. The line of temperatures of maximum density (TMD) was determined in the pressure-temperature phase diagram. Similarly the diffusion constant at a constant temperature, D, has a maximum at a density ρmax and a minimum at a density ρmin<ρmax. In the pressure-temperature phase diagram the line of extrema in diffusivity is outside of the TMD line. Although this interparticle potential lacks directionality, this is the same behavior observed in simple point charge/extended water. |
id |
UFRGS-2_c15d4e6365c185e5624cf10c2c0cb338 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/205015 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Oliveira, Alan Barros deNetz, Paulo AugustoColla, Thiago EscobarBarbosa, Marcia Cristina Bernardes2020-01-28T04:12:12Z20060021-9606http://hdl.handle.net/10183/205015000555135Using molecular-dynamics simulations and integral equations (Rogers-Young, Percus-Yevick, and hypernetted chain closures) we investigate the thermodynamics of particles interacting with continuous core-softened intermolecular potential. Dynamic properties are also analyzed by the simulations. We show that, for a chosen shape of the potential, the density, at constant pressure, has a maximum for a certain temperature. The line of temperatures of maximum density (TMD) was determined in the pressure-temperature phase diagram. Similarly the diffusion constant at a constant temperature, D, has a maximum at a density ρmax and a minimum at a density ρmin<ρmax. In the pressure-temperature phase diagram the line of extrema in diffusivity is outside of the TMD line. Although this interparticle potential lacks directionality, this is the same behavior observed in simple point charge/extended water.application/pdfengThe journal of chemical physics. New York. Vol. 124, no. 8 (Feb. 2006), 084505, 6 p.DifusãoEquações integraisDinâmica molecularDiagramas de faseTermodinâmicaÁguaThermodynamic and dynamic anomalies for a three-dimensional isotropic core-softened potentialEstrangeiroinfo: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:UFRGSTEXT000555135.pdf.txt000555135.pdf.txtExtracted Texttext/plain29039http://www.lume.ufrgs.br/bitstream/10183/205015/2/000555135.pdf.txtef216cf56be41b2b0f09a3509b525c9dMD52ORIGINAL000555135.pdfTexto completo (inglês)application/pdf511649http://www.lume.ufrgs.br/bitstream/10183/205015/1/000555135.pdfff105adec660372c1f51fa00602aa551MD5110183/2050152024-02-07 06:01:48.783572oai:www.lume.ufrgs.br:10183/205015Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-02-07T08:01:48Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Thermodynamic and dynamic anomalies for a three-dimensional isotropic core-softened potential |
title |
Thermodynamic and dynamic anomalies for a three-dimensional isotropic core-softened potential |
spellingShingle |
Thermodynamic and dynamic anomalies for a three-dimensional isotropic core-softened potential Oliveira, Alan Barros de Difusão Equações integrais Dinâmica molecular Diagramas de fase Termodinâmica Água |
title_short |
Thermodynamic and dynamic anomalies for a three-dimensional isotropic core-softened potential |
title_full |
Thermodynamic and dynamic anomalies for a three-dimensional isotropic core-softened potential |
title_fullStr |
Thermodynamic and dynamic anomalies for a three-dimensional isotropic core-softened potential |
title_full_unstemmed |
Thermodynamic and dynamic anomalies for a three-dimensional isotropic core-softened potential |
title_sort |
Thermodynamic and dynamic anomalies for a three-dimensional isotropic core-softened potential |
author |
Oliveira, Alan Barros de |
author_facet |
Oliveira, Alan Barros de Netz, Paulo Augusto Colla, Thiago Escobar Barbosa, Marcia Cristina Bernardes |
author_role |
author |
author2 |
Netz, Paulo Augusto Colla, Thiago Escobar Barbosa, Marcia Cristina Bernardes |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Oliveira, Alan Barros de Netz, Paulo Augusto Colla, Thiago Escobar Barbosa, Marcia Cristina Bernardes |
dc.subject.por.fl_str_mv |
Difusão Equações integrais Dinâmica molecular Diagramas de fase Termodinâmica Água |
topic |
Difusão Equações integrais Dinâmica molecular Diagramas de fase Termodinâmica Água |
description |
Using molecular-dynamics simulations and integral equations (Rogers-Young, Percus-Yevick, and hypernetted chain closures) we investigate the thermodynamics of particles interacting with continuous core-softened intermolecular potential. Dynamic properties are also analyzed by the simulations. We show that, for a chosen shape of the potential, the density, at constant pressure, has a maximum for a certain temperature. The line of temperatures of maximum density (TMD) was determined in the pressure-temperature phase diagram. Similarly the diffusion constant at a constant temperature, D, has a maximum at a density ρmax and a minimum at a density ρmin<ρmax. In the pressure-temperature phase diagram the line of extrema in diffusivity is outside of the TMD line. Although this interparticle potential lacks directionality, this is the same behavior observed in simple point charge/extended water. |
publishDate |
2006 |
dc.date.issued.fl_str_mv |
2006 |
dc.date.accessioned.fl_str_mv |
2020-01-28T04:12:12Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/205015 |
dc.identifier.issn.pt_BR.fl_str_mv |
0021-9606 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000555135 |
identifier_str_mv |
0021-9606 000555135 |
url |
http://hdl.handle.net/10183/205015 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The journal of chemical physics. New York. Vol. 124, no. 8 (Feb. 2006), 084505, 6 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/205015/2/000555135.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/205015/1/000555135.pdf |
bitstream.checksum.fl_str_mv |
ef216cf56be41b2b0f09a3509b525c9d ff105adec660372c1f51fa00602aa551 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801224983928635392 |