PublicaciĂłn:
EFFECT OF HYDRODYNAMIC INTERACTIONS ON SELF-DIFFUSION OF QUASI-TWO-DIMENSIONAL COLLOIDAL HARD SPHERES

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dc.creatorROBERTO EDUARDO ROZAS CÁRDENAS
dc.date2015
dc.date.accessioned2025-01-10T14:37:16Z
dc.date.available2025-01-10T14:37:16Z
dc.date.issued2015
dc.description.abstractWE COMPARE EXPERIMENTAL RESULTS FROM A QUASI-TWO-DIMENSIONAL COLLOIDAL HARD SPHERE FLUID TO A MONTE CARLO SIMULATION OF HARD DISKS WITH SMALL PARTICLE DISPLACEMENTS. THE EXPERIMENTAL SHORT-TIME SELF-DIFFUSION COEFFICIENT D(S) SCALED BY THE DIFFUSION COEFFICIENT AT INFINITE DILUTION, D(0), STRONGLY DEPENDS ON THE AREA FRACTION, POINTING TO SIGNIFICANT HYDRODYNAMIC INTERACTIONS AT SHORT TIMES IN THE EXPERIMENT, WHICH ARE ABSENT IN THE SIMULATION. IN CONTRAST, THE AREA FRACTION DEPENDENCE OF THE EXPERIMENTAL LONG-TIME SELF-DIFFUSION COEFFICIENT D(L)/D(0) IS IN QUANTITATIVE AGREEMENT WITH D(L)/D(0) OBTAINED FROM THE SIMULATION. THIS INDICATES THAT THE REDUCTION IN THE PARTICLE MOBILITY AT SHORT TIMES DUE TO HYDRODYNAMIC INTERACTIONS DOES NOT LEAD TO A PROPORTIONAL REDUCTION IN THE LONG-TIME SELF-DIFFUSION COEFFICIENT. FURTHERMORE, THE QUANTITATIVE AGREEMENT BETWEEN EXPERIMENT AND SIMULATION AT LONG TIMES INDICATES THAT HYDRODYNAMIC INTERACTIONS EFFECTIVELY DO NOT AFFECT THE DEPENDENCE OF D(L)/D(0) ON THE AREA FRACTION. IN LIGHT OF THIS, WE DISCUSS THE LINK BETWEEN STRUCTURE AND LONG-TIME SELF-DIFFUSION IN TERMS OF A CONFIGURATIONAL EXCESS ENTROPY AND DO NOT FIND A SIMPLE EXPONENTIAL RELATION BETWEEN THESE QUANTITIES FOR ALL FLUID AREA FRACTIONS.
dc.formatapplication/pdf
dc.identifier.doi10.1103/PhysRevLett.115.268301
dc.identifier.issn1079-7114
dc.identifier.issn0031-9007
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/8229
dc.languagespa
dc.publisherPHYSICAL REVIEW LETTERS
dc.relation.uri10.1103/PhysRevLett.115.268301
dc.rightsPUBLICADA
dc.titleEFFECT OF HYDRODYNAMIC INTERACTIONS ON SELF-DIFFUSION OF QUASI-TWO-DIMENSIONAL COLLOIDAL HARD SPHERES
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE FISICA
ubb.SedeCONCEPCIÓN
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