Abstract
A simple practical formula for the shear viscosity coefficient of Yukawa fluids is presented. This formula allows estimation of the shear viscosity in a very extended range of temperatures, from the melting point to ≃ 100 times the melting temperature. It demonstrates reasonable agreement with the available results from molecular dynamics simulations. Some aspects of the temperature dependence of the shear viscosity and diffusion coefficients on approaching the fluid-solid phase transition are discussed.
Highlights
Studies of static and dynamical properties of Yukawa systems constitute an important interdisciplinary topic with applications to strongly coupled plasmas, complex plasmas, and colloidal suspensions
The proposed formula is shown to describe quite well the available results from numerical simulations in a very broad temperature range, from the melting temperature to 100 times the melting temperature
The Yukawa systems are characterized by the repulsion between point-like charged particles immersed into neutralizing background, which provides screening
Summary
Studies of static and dynamical properties of Yukawa systems constitute an important interdisciplinary topic with applications to strongly coupled plasmas, complex (dusty) plasmas, and colloidal suspensions. Significant efforts have been made over the years to understand the transport properties of such systems This includes diffusion, viscosity, and thermal conductivity. The main purpose of this article is to present a useful practical expression to estimate the shear viscosity coefficient of three-dimensional Yukawa fluids in a wide regime of coupling and screening. The proposed formula is shown to describe quite well (deviations are within ± 10%) the available results from numerical simulations in a very broad temperature range, from the melting temperature to 100 times the melting temperature. It can be useful in the context of complex (dusty) plasmas and related soft weakly dissipative systems
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