Effective Potential and Interdiffusion in Binary Ionic Mixtures
arXiv:1409.1407 · doi:10.1103/PhysRevE.90.033102
Abstract
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 [PRL, 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.
10 pages, 4 figures, Phys. Rev. E (accepted)
References in corpus (17)
- A white dwarf cooling age of 8 Gyr for NGC 6791 from physical separation processes
- Dense plasmas in astrophysics: from giant planets to neutron stars
- Ultracold Neutral Plasmas
- Gravitational Settling of 22Ne in Liquid White Dwarf Interiors
- Evaporative Cooling of Antiprotons to Cryogenic Temperatures
- Sedimentation and Type I X-ray Bursts at Low Accretion Rates
- Gravitational Settling of ^{22}Ne in Liquid White Dwarf Interiors--Cooling and Seismological Effects
- Evolution of white dwarf stars with high-metallicity progenitors: the role of 22Ne diffusion
- Evolution of Young Neutron Star Envelopes
- Diffusion of Neon in White Dwarf Stars
- Velocity Relaxation in a Strongly Coupled Plasma
- Diffusive Nuclear Burning of Helium on Neutron Stars
- Diffusive Nuclear Burning in Neutron Star Envelopes
- Diffusive Nuclear Burning on Neutron Star Envelopes
- Diffusion and Coulomb separation of ions in dense matter
- Diffusion in Coulomb Crystals
- Effective Coulomb Logarithm for One Component Plasma
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- Effective Potential Theory: A Practical Way to Extend Plasma Transport Theory to Strong Coupling
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