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Cluster pair correlation function of simple fluids: Energetic connectivity criteria

机译:简单流体的簇对相关函数:能量连通性准则

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We consider the clustering of Lennard-Jones particles by using an energetic connectivity criterion proposed long ago by Hill [J.Chem.Phys.32,617 (1955)] for the bond between pairs of particles.The criterion establishes that two particles are bonded (directly connected) if their relative kinetic energy is less than minus their relative potential energy.Thus,in general,it depends on the direction as well as on the magnitude of the velocities and positions of the particles.An integral equation for the pair connectedness function,proposed by two of the authors [Phys.Rev.E 61,R6067 (2000)],is solved for this criterion and the results are compared with those obtained from molecular dynamics simulations and from a connectedness Percus-Yevick-type integral equation for a velocity-averaged version of Hill's energetic criterion.
机译:我们使用Hill [J.Chem.Phys.32,617(1955)]早前提出的能量连通性准则来考虑Lennard-Jones粒子的聚类,以建立粒子对之间的键合。该准则确定两个粒子是键合的(直接如果它们的相对动能小于其相对势能,则通常取决于方向以及粒子的速度和位置的大小。对连通性函数的积分方程为此标准解决了两位作者[Phys.Rev.E 61,R6067(2000)]提出的问题,并将结果与​​从分子动力学模拟和从连通性Percus-Yevick型积分方程得到的结果进行了比较。希尔能量准则的速度平均形式。

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