{
  "id": "cond-mat/0402521",
  "version": "v1",
  "published": "2004-02-20T13:20:42.000Z",
  "updated": "2004-02-20T13:20:42.000Z",
  "title": "The bulk viscosity of a symmetrical Lennard--Jones mixture above and at liquid--liquid coexistence: A computer simulation study",
  "authors": [
    "Subir K. Das",
    "Jürgen Horbach",
    "Kurt Binder"
  ],
  "comment": "19 pages including 6 figures",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "A 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 $\\kappa_T$ and concentration susceptibility $\\chi$) as well as the shear and the bulk viscosity $\\eta_{\\rm s}$ and $\\eta_{\\rm B}$, 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 $\\kappa_T$ and $\\chi$ increase significantly near the coexistence line reflecting the vicinity of the critical point. Whereas $\\eta_{\\rm s}$ exhibits a weak temperature dependence, $\\eta_{\\rm B}$ increases significantly near the coexistence curve.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-02-20T13:20:42.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "computer simulation study",
      "symmetrical lennard-jones mixture",
      "bulk viscosity",
      "liquid-liquid coexistence",
      "coexistence line"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2004cond.mat..2521D"
    }
  }
}