Phase Coexistence of a Stockmayer Fluid in an Applied Field

Abstract

We examine two aspects of Stockmayer fluids which consists of point dipoles that additionally interact via an attractive Lennard-Jones potential. We perform Monte Carlo simulations to examine the effect of an applied field on the liquid-gas phase coexistence and show that a magnetic fluid phase does exist in the absence of an applied field. As part of the search for the magnetic fluid phase, we perform Gibbs ensemble simulations to determine phase coexistence curves at large dipole moments, $\mu$. The critical temperature is found to depend linearly on ${\mu }^2$ for intermediate values of $\mu$ beyond the initial nonlinear behavior near $\mu =0$ and less than the $\mu$ where no liquid-gas phase coexistence has been found. For phase coexistence in an applied field, the critical temperatures as a function of the applied field for two different $\mu$ are mapped onto a single curve. The critical densities hardly change as a function of applied field. We also verify that in an applied field the liquid droplets within the two phase coexistence region become elongated in the direction of the field.

23 pages, ReVTeX, 7 figures

Cited by in corpus (16)

• A molecular dynamics study on the equilibrium magnetization properties and structure of ferrofluids
• Magnetic properties of colloidal suspensions of interacting magnetic particles
• Magnetization of ferrofluids with dipolar interactions - a Born--Mayer expansion
• Orientational order in dipolar fluids consisting of nonspherical hard particles
• Crystal structures and freezing of dipolar fluids
• Thermodynamic Limit for Dipolar Media
• Structure and dielectric properties of polar fluids with extended dipoles: results from numerical simulations
• Inelastic collisions and anisotropic aggregation of particles in a nematic collider driven by backflow
• Inhomogeneous magnetization in dipolar ferromagnetic liquids
• Non-equilibrium condensation and coarsening of field-driven dipolar colloids
• Applying electric field to charged and polar particles between metallic plates: Extension of the Ewald method
• Vapor-liquid coexistence of the Stockmayer fluid in nonuniform external fields
• Network formation and gelation in Telechelic star polymers
• Dielectrocapillarity for exquisite control of fluids
• Ferromagnetic Liquid Thin Films Under Applied Field
• Microscale modelling of dielectrophoresis assembly processes