Evidence for the Influence of Hydrodynamics in a Phase-Separating Fluid

Abstract
Light scattering and microscopic observation were used to study phase separation in a critical binary mixture of 2,6-lutidine and water. A crossover in the growth rate of nucleating regions occurred at a characteristic size l10 μm. We also observed the temporal fluctuations in the system. They give rise to a strongly non-Lorentzian power spectrum.