Thermodynamic and dynamic anomalies for dumbbell molecules interacting with a repulsive ramplike potential
Autor(a) principal: | |
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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/10183/101608 |
Resumo: | Using collision driven discrete molecular dynamics, we investigate the thermodynamics and dynamics of systems of 500 dumbbell molecules interacting by a purely repulsive ramplike discretized potential, consisting of n steps of equal size. We compare the behavior of the two systems, with n=18 and n=144 steps. Each system exhibits both thermodynamic and dynamic anomalies, a density maximum and the translational and rotational mobilities show anomalous behavior. Starting with very dense systems and decreasing the density, both mobilities first increase, reach a maximum, then decrease, reach a minimum, and finally increase; this behavior is similar to the behavior of SPC/E Simple Point Charge-Extended water. The regions in the pressure-temperature plane of translational and rotational mobility anomalies depend strongly on n. The product of the translational diffusion coefficient and the orientational correlation time increases with temperature, in contrast with the behavior of most liquids. |
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Netz, Paulo AugustoBuldyrev, Sergey V.Barbosa, Marcia Cristina BernardesStanley, H. Eugene2014-08-22T02:11:05Z20061539-3755http://hdl.handle.net/10183/101608000543649Using collision driven discrete molecular dynamics, we investigate the thermodynamics and dynamics of systems of 500 dumbbell molecules interacting by a purely repulsive ramplike discretized potential, consisting of n steps of equal size. We compare the behavior of the two systems, with n=18 and n=144 steps. Each system exhibits both thermodynamic and dynamic anomalies, a density maximum and the translational and rotational mobilities show anomalous behavior. Starting with very dense systems and decreasing the density, both mobilities first increase, reach a maximum, then decrease, reach a minimum, and finally increase; this behavior is similar to the behavior of SPC/E Simple Point Charge-Extended water. The regions in the pressure-temperature plane of translational and rotational mobility anomalies depend strongly on n. The product of the translational diffusion coefficient and the orientational correlation time increases with temperature, in contrast with the behavior of most liquids.application/pdfengPhysical review. E, Statistical, nonlinear, and soft matter physics. Vol. 73, no. 6 (June 2006), 061504, 7 p.TermodinâmicaDinâmica molecularThermodynamic and dynamic anomalies for dumbbell molecules interacting with a repulsive ramplike 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:UFRGSORIGINAL000543649.pdf000543649.pdfTexto completo (inglês)application/pdf129952http://www.lume.ufrgs.br/bitstream/10183/101608/1/000543649.pdf09630340eb2315994e18c95c2da24b3cMD51TEXT000543649.pdf.txt000543649.pdf.txtExtracted Texttext/plain31966http://www.lume.ufrgs.br/bitstream/10183/101608/2/000543649.pdf.txt38410822f2f96475c4ad69657da09588MD52THUMBNAIL000543649.pdf.jpg000543649.pdf.jpgGenerated Thumbnailimage/jpeg2042http://www.lume.ufrgs.br/bitstream/10183/101608/3/000543649.pdf.jpge574e8152bbb3b1f1496a910145cdb63MD5310183/1016082024-02-07 06:01:43.059704oai:www.lume.ufrgs.br:10183/101608Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-02-07T08:01:43Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Thermodynamic and dynamic anomalies for dumbbell molecules interacting with a repulsive ramplike potential |
title |
Thermodynamic and dynamic anomalies for dumbbell molecules interacting with a repulsive ramplike potential |
spellingShingle |
Thermodynamic and dynamic anomalies for dumbbell molecules interacting with a repulsive ramplike potential Netz, Paulo Augusto Termodinâmica Dinâmica molecular |
title_short |
Thermodynamic and dynamic anomalies for dumbbell molecules interacting with a repulsive ramplike potential |
title_full |
Thermodynamic and dynamic anomalies for dumbbell molecules interacting with a repulsive ramplike potential |
title_fullStr |
Thermodynamic and dynamic anomalies for dumbbell molecules interacting with a repulsive ramplike potential |
title_full_unstemmed |
Thermodynamic and dynamic anomalies for dumbbell molecules interacting with a repulsive ramplike potential |
title_sort |
Thermodynamic and dynamic anomalies for dumbbell molecules interacting with a repulsive ramplike potential |
author |
Netz, Paulo Augusto |
author_facet |
Netz, Paulo Augusto Buldyrev, Sergey V. Barbosa, Marcia Cristina Bernardes Stanley, H. Eugene |
author_role |
author |
author2 |
Buldyrev, Sergey V. Barbosa, Marcia Cristina Bernardes Stanley, H. Eugene |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Netz, Paulo Augusto Buldyrev, Sergey V. Barbosa, Marcia Cristina Bernardes Stanley, H. Eugene |
dc.subject.por.fl_str_mv |
Termodinâmica Dinâmica molecular |
topic |
Termodinâmica Dinâmica molecular |
description |
Using collision driven discrete molecular dynamics, we investigate the thermodynamics and dynamics of systems of 500 dumbbell molecules interacting by a purely repulsive ramplike discretized potential, consisting of n steps of equal size. We compare the behavior of the two systems, with n=18 and n=144 steps. Each system exhibits both thermodynamic and dynamic anomalies, a density maximum and the translational and rotational mobilities show anomalous behavior. Starting with very dense systems and decreasing the density, both mobilities first increase, reach a maximum, then decrease, reach a minimum, and finally increase; this behavior is similar to the behavior of SPC/E Simple Point Charge-Extended water. The regions in the pressure-temperature plane of translational and rotational mobility anomalies depend strongly on n. The product of the translational diffusion coefficient and the orientational correlation time increases with temperature, in contrast with the behavior of most liquids. |
publishDate |
2006 |
dc.date.issued.fl_str_mv |
2006 |
dc.date.accessioned.fl_str_mv |
2014-08-22T02:11:05Z |
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/10183/101608 |
dc.identifier.issn.pt_BR.fl_str_mv |
1539-3755 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000543649 |
identifier_str_mv |
1539-3755 000543649 |
url |
http://hdl.handle.net/10183/101608 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. E, Statistical, nonlinear, and soft matter physics. Vol. 73, no. 6 (June 2006), 061504, 7 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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