Excess entropy of strongly coupled Yukawa fluids

Abstract

The entropy of strongly coupled Yukawa fluids is discussed from several perspectives. First, it is demonstrated that a vibrational paradigm of atomic dynamics in dense fluids can be used to obtain a simple and accurate estimate of the entropy without any adjustable parameters. Second, it is explained why a quasiuniversal value of the excess entropy of simple fluids at the freezing point should be expected, and it is demonstrated that a remaining very weak dependence of the freezing point entropy on the screening parameter in the Yukawa fluid can be described by a simple linear function. Third, a scaling of the excess entropy with the freezing temperature is examined, a modified form of the Rosenfeld-Tarazona scaling is put forward, and some consequences are briefly discussed. Fourth, the location of the Frenkel line on the phase diagram of Yukawa systems is discussed in terms of the excess entropy and compared with some predictions made in the literature. Fifth, the excess entropy scaling of the transport coefficients (self-diffusion, viscosity, and thermal conductivity) is reexamined using the contemporary datasets for the transport properties of Yukawa fluids. The results could be of particular interest in the context of complex (dusty) plasmas, colloidal suspensions, electrolytes, and other related systems with soft pairwise interactions.

11 pages, 6 figures

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Cited by in corpus (9)

• Generalized Rosenfeld-Tarazona scaling and high-density specific heat of simple liquids
• Speed of sound in dense simple liquids
• Vibrational model of entropy in dense two-dimensional fluids
• Heat capacity of dense liquids: A link between two-phase model and melting temperature scaling
• Weak decaying collective-excitation approximation for Yukawa one-component plasmas
• Excess entropy scaling of the transverse sound speed in simple fluids
• Variational approach to Yukawa fluids. II. Instantaneous elastic moduli and sound velocities
• Variational approach to Yukawa fluids. I. Thermodynamics
• Inferring partial crystalline order in liquids from electrical resistivity