Tests of Dynamical Scaling in 3-D Spinodal Decomposition

Details Tests of Dynamical Scaling in 3-D Spinodal Decomposition Tests of Dynamical Scaling in 3-D Spinodal Decomposition

1998-10-22

arxiv.org/abs/cond-mat/9810298v1

Physics

Condensed Matter

Soft Condensed Matter

Submitted to Phys. Rev. E

Scientific paper

10.1103/PhysRevE.59.R2535

We simulate late-stage coarsening of a 3-D symmetric binary fluid. With reduced units l,t (with scales set by viscosity, density and surface tension) our data extends two decades in t beyond earlier work. Across at least four decades, our own and others' individual datasets (< 1 decade each) show viscous hydrodynamic scaling (l ~ a + b t), but b is not constant between runs as this scaling demands. This betrays either the unexpected intrusion of a discretization (or molecular) lengthscale, or an exceptionally slow crossover between viscous and inertial regimes.

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