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Research paper thumbnail of Observation of Periodic Spinodal Decomposition

Physical Review Letters, 1983

ABSTRACT

Research paper thumbnail of Periodic spinodal decomposition in a binary liquid mixture

Physical Review A, 1985

ABSTRACT

Research paper thumbnail of Evidence for Coupling of Velocity and Composition Fluctuations in a Binary Liquid Mixture

Physical Review Letters, 1982

Research paper thumbnail of Observation of the relaxation of composition fluctuations in a binary liquid mixture

Physica A: Statistical Mechanics and its Applications, 1983

Light scattering was used to study the decay of concentration fluctuations in a critical mixture ... more Light scattering was used to study the decay of concentration fluctuations in a critical mixture of isobutyric acid and water. The aim of the experiment was to study the dynamic interaction between composition and velocity in the mixture. At large wavenumber, the structure factor S(k, t) is observed to decay exponentially, with a relaxation rate somewhat smaller than the equilibrium value. At small k, however, there is a marked departure from the exponential relaxation one expects in the absence of coupling between composition and velocity. Also measured was the spinodal ring diameter, km, as a function of the total scattered intensity, Ctot(t) = (2pi)-2 ∫ S(k, t)k2 dk. A calculation of Ruiz, based on the above coupling effect, predicts a linear variation of Inkm(t) with Ctot(t) and such a linear variation is observed.

Research paper thumbnail of Observation of Periodic Spinodal Decomposition

Physical Review Letters, 1983

ABSTRACT

Research paper thumbnail of Periodic spinodal decomposition in a binary liquid mixture

Physical Review A, 1985

ABSTRACT

Research paper thumbnail of Evidence for Coupling of Velocity and Composition Fluctuations in a Binary Liquid Mixture

Physical Review Letters, 1982

Research paper thumbnail of Observation of the relaxation of composition fluctuations in a binary liquid mixture

Physica A: Statistical Mechanics and its Applications, 1983

Light scattering was used to study the decay of concentration fluctuations in a critical mixture ... more Light scattering was used to study the decay of concentration fluctuations in a critical mixture of isobutyric acid and water. The aim of the experiment was to study the dynamic interaction between composition and velocity in the mixture. At large wavenumber, the structure factor S(k, t) is observed to decay exponentially, with a relaxation rate somewhat smaller than the equilibrium value. At small k, however, there is a marked departure from the exponential relaxation one expects in the absence of coupling between composition and velocity. Also measured was the spinodal ring diameter, km, as a function of the total scattered intensity, Ctot(t) = (2pi)-2 ∫ S(k, t)k2 dk. A calculation of Ruiz, based on the above coupling effect, predicts a linear variation of Inkm(t) with Ctot(t) and such a linear variation is observed.

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