Effects of Density Conservation and Hydrodynamics on Aging in Nonequilibrium Processes

Abstract

Aging in kinetics of three different phase transitions, viz., magnetic, binary solid and single component fluid, have been studied via Monte Carlo and molecular dynamics simulations in three space dimensions with the objective of identifying the effects of order-parameter conservation and hydrodynamics. We observe that the relevant autocorrelations exhibit power-law decay in ferromagnet and binary solid but with different exponents. At early time fluid autocorrelation function nicely follows that of binary solid, the order parameter being conserved for both of them, as opposed to a ferromagnet. At late time the fluid data crosses over to an exponential decay which we identify as a hydrodynamic effect and provide analytical justification for this behavior.

4 pages, 4 figures

References in corpus (4)

• Efficient measurement of linear susceptibilities in molecular simulations: Application to aging supercooled liquids
• Subdiffusion and intermittent dynamic fluctuations in the aging regime of concentrated hard spheres
• Nucleation and Growth of Droplets in Vapor-Liquid Transitions
• Logarithmic relaxation and stress aging in the electron glass

Cited by in corpus (9)

• Aging in the long-range Ising model
• Fragmentation and Limits to Dynamical Scaling in Viscous Coarsening: An Interrupted in situ X-Ray Tomographic Study
• Kinetics of Vapor-Solid Phase Transitions: Structure, growth and mechanism
• Dimensionality Dependence of Aging in Kinetics of Diffusive Phase Separation: Behavior of order-parameter autocorrelation
• Ballistic Aggregation in Systems of Inelastic Particles: Cluster growth, structure and aging
• Kinetics of Fluid Phase Separation
• Aging Phenomena during Phase Separation in Fluids: Decay of autocorrelation for vapor-liquid transitions
• Coarsening in 3D Nonconserved Ising Model at Zero Temperature: Anomalies in structure and relaxation of order-parameter autocorrelation
• Initial Correlation Dependence of Aging in Phase Separating Solid Binary Mixtures and Ordering Ferromagnets