A Lattice-Gas With Long-Range Interactions Coupled to a Heat Bath

Abstract

Introduced is a lattice-gas with long-range 2-body interactions. An effective inter-particle force is mediated by momentum exchanges. There exists the possibility of having both attractive and repulsive interactions using finite impact parameter collisions. There also exists an interesting possibility of coupling these long-range interactions to a heat bath. A fixed temperature heat bath induces a permanent net attractive interpartide potential, but at the expense of reversibility. Thus the long-range dynamics is a kind of a Monte Carlo Kawasaki updating scheme. The model has a PpT equation of state. Presented are analytical and numerical results for a lattice-gas fluid governed by a nonideal equation of state. The model's complexity is not much beyond that of the FHP lattice-gas. It is suitable for massively parallel processing and may be used to study critical phenomena in large systems.

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Document Details

Document Type
Technical Report
Publication Date
Sep 10, 1993
Accession Number
ADA437814

Entities

People

  • Jeffrey Yepez

Organizations

  • Phillips Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Angular Momentum
  • Automata
  • Collisions
  • Computer Science
  • Critical Temperature
  • Dynamics
  • Energy
  • Equations
  • Gas Dynamics
  • Momentum
  • Particles
  • Phase Transformations
  • Physics Laboratories
  • Potential Energy
  • Simulations
  • Transition Temperature
  • Transitions

Readers

  • Computational Fluid Dynamics (CFD)
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.