Lattice-gas simulations of domain growth, saturation, and self-assembly in immiscible fluidsand microemulsions

Andrew N. Emerton, Peter V. Coveney, Bruce M. Boghosian
1997 Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics  
We investigate the dynamical behavior of both binary fluid and ternary microemulsion systems in two dimensions using a recently introduced hydrodynamic lattice-gas model of microemulsions. We find that the presence of amphiphile in our simulations reduces the usual oil-water interfacial tension in accord with experiment and consequently affects the non-equilibrium growth of oil and water domains. As the density of surfactant is increased we observe a crossover from the usual two-dimensional
more » ... ry fluid scaling laws to a growth that is slow, and we find that this slow growth can be characterized by a logarithmic time scale. With sufficient surfactant in the system we observe that the domains cease to grow beyond a certain point and we find that this final characteristic domain size is inversely proportional to the interfacial surfactant concentration in the system.
doi:10.1103/physreve.55.708 fatcat:bsz5viowezfztkmxm6jg45qqba