Large Lattice Discretization Effects on the Phase Coexistence of Ionic Fluids

Journal Article · Fri Oct 01 04:00:00 EDT 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.83.2981· OSTI ID:686903

Panagiotopoulos, A Z ^[1]; Kumar, S K ^[2]

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1. Institute for Physical Science and Technology and Department of Chemical Engineering, University of Maryland, College Park, Maryland 20742-2431 (United States)
2. Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)

We examine the phase behavior of lattice restricted primitive models for integer values of the ratio of ionic diameter to lattice spacing, {xi} . For {xi}{le}2 , there is coexistence between a disordered phase and an antiferromagnetic phase, but no vapor-liquid equilibrium. For {xi}{ge}3 , a region of normal vapor-liquid coexistence is found, with critical temperatures and densities which are very close to their continuous space counterparts. Our findings stress that lattice structure can result in qualitatively different physics from continuous space models, but that the two models converge even for relatively coarsely discretized lattices. {copyright} {ital 1999} {ital The American Physical Society }

• OSTI ID: 686903
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANTIFERROMAGNETISM
CRITICAL TEMPERATURE
CUBIC LATTICES
DENSITY
FLUIDS
HARD-SPHERE MODEL
PHASE TRANSFORMATIONS