  We simulate the dynamics of phase assembly in binary immiscible fluids and
ternary microemulsions using a three-dimensional hydrodynamic lattice gas
approach. For critical spinodal decomposition we perform the scaling analysis
in reduced variables introduced by Jury et al. and Kendon et al. We find a
late-stage scaling exponent consistent with the inertial regime. However, as
observed with the previous lattice-gas model of Appert et al. our data does not
fall in the same range of reduced length and time as that of Kendon et al. For
off-critical binary spinodal decomposition we observe a reduction of the
effective exponent with the volume fraction of the minority phase. However, the
n=1/3 Lifshitz-Slyzov-Wagner droplet coalescence exponent is not observed.
Adding a sufficient number of surfactant particles to a critical quench of
binary immiscible fluids produces a ternary bicontinuous microemulsion. We
observe a change in scaling behaviour from algebraic to logarithmic growth for
amphiphilic fluids in which the domain growth is not arrested. For formation of
a microemulsion where the domain growth is halted we find a stretched
exponential growth law provides the best fit to the data.

Soft Condensed Matter