COMMENT ON EQUATION OF STATE AND PHASE-DIAGRAMS FOR DENSE MULTI-IONICMIXTURE PLASMAS

Authors
Citation
Y. Rosenfeld, COMMENT ON EQUATION OF STATE AND PHASE-DIAGRAMS FOR DENSE MULTI-IONICMIXTURE PLASMAS, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 52(3), 1995, pp. 3292-3296
Citations number
27
Categorie Soggetti
Physycs, Mathematical","Phsycs, Fluid & Plasmas
ISSN journal
1063651X
Volume
52
Issue
3
Year of publication
1995
Part
B
Pages
3292 - 3296
Database
ISI
SICI code
1063-651X(1995)52:3<3292:COEOSA>2.0.ZU;2-U
Abstract
An equation of state for dense fluid binary-ionic mixture (BIM) plasma s was derived recently by Ogata, Iyetomi, Ichimaru, and Van Horn [Phys . Rev. E 48, 1344 (1993)] from extensive Monte Carlo simulations data. They emphasized in particular the significance of finding negative de viation from the linear-mixing approximation. In this Comment, I show that the important features of their results are the outcome of their particular choice for the equation of state of the one-component plasm a, which has relatively large error bars that have not been properly t aken into account and are not necessarily borne out by their data for the binary mixtures. I repeated their analysis of their same data for the bindary mixtures, but used another, comparable, one-component plas ma fluid equation of state to find always positive deviations from lin ear mixing, in contradiction also with the sum-rule analysis of their free energy with respect to the zero separation of the screening poten tials.