Effective potential and interdiffusion in binary ionic mixtures

被引：21

作者：

Beznogov, M. V. ^{[1
]}

Yakovlev, D. G. ^{[2
]}

机构：

[1] St Petersburg Acad Univ, St Petersburg 194021, Russia

[2] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

来源：

PHYSICAL REVIEW E | 2014年 / 90卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

ONE-COMPONENT PLASMA; NEUTRON-STAR ENVELOPES; WHITE-DWARF INTERIORS; DIFFUSION-COEFFICIENTS; STATISTICAL-MECHANICS; MOLECULAR-DYNAMICS; SELF-DIFFUSION; YUKAWA SYSTEMS; DENSE-PLASMAS; EQUATION;

D O I：

10.1103/PhysRevE.90.033102

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We calculate interdiffusion coefficients in a two-component, weakly or strongly coupled ion plasma (gas or liquid, composed of two ion species immersed into a neutralizing electron background). We use an effective potential method proposed recently by Baalrud and Daligaut [Phys. Rev. Lett. 110, 235001 (2013)]. It allows us to extend the standard Chapman-Enskog procedure of calculating the interdiffusion coefficients to the case of strong Coulomb coupling. We compute binary diffusion coefficients for several ionic mixtures and fit them by convenient expressions in terms of the generalized Coulomb logarithm. These fits cover a wide range of plasma parameters spanning from weak to strong Coulomb couplings. They can be used to simulate diffusion of ions in ordinary stars as well as in white dwarfs and neutron stars.

引用

页数：9

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