The bulk viscosity of a symmetrical Lennard--Jones mixture above and at liquid--liquid coexistence: A computer simulation study

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dc.creatorDas, Subir K.
dc.creatorHorbach, Jürgen
dc.creatorBinder, Kurt
dc.date2004-02-20
dc.date.accessioned2026-07-07T02:56:34Z
dc.date.available2026-07-07T02:56:34Z
dc.descriptionA Lennard--Jones model of a binary dense liquid (A,B) with a symmetrical miscibility gap is investigated by means of computer simulation methods. Semigrand--canonical Monte Carlo simulations yield the phase diagram in the $T$--$x$ plane ($T$: temperature, $x$: concentration of A or B particles) as well as equilibrated configurations at coexistence. Then Molecular Dynamics simulations use these configurations to determine static properties (isothermal compressibility $κ_T$ and concentration susceptibility $χ$) as well as the shear and the bulk viscosity $η_{\rm s}$ and $η_{\rm B}$, respectively. The latter quantities are calculated along a path approaching the coexistence line from high temperatures in the one--phase region and ending at a state at the coexistence line about 15% below the critical point. We find that $κ_T$ and $χ$ increase significantly near the coexistence line reflecting the vicinity of the critical point. Whereas $η_{\rm s}$ exhibits a weak temperature dependence, $η_{\rm B}$ increases significantly near the coexistence curve.
dc.description19 pages including 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0402521
dc.identifierhttp://arxiv.org/abs/cond-mat/0402521
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23376
dc.subjectStatistical Mechanics
dc.titleThe bulk viscosity of a symmetrical Lennard--Jones mixture above and at liquid--liquid coexistence: A computer simulation study
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