Measuring the Viscosity and Time Correlation Functions in a Microscopic Model of a Microemulsion

Details Measuring the Viscosity and Time Correlation Functions in a Microscopic Model of a Microemulsion Measuring the Viscosity and Time Correlation Functions in a Microscopic Model of a Microemulsion

1999-06-04

arxiv.org/abs/cond-mat/9906069v2

Physics

Condensed Matter

Statistical Mechanics

REVTeX: 8 pages (twocolumn mode), six eps figures. Requires amsmath and graphicx packages

Scientific paper

A dynamical lattice model is used to study the viscosity and the velocity-velocity autocorrelation function in a microemulsion phase. We find evidence of anomalous viscosities in these phases (relative to water-rich and/or oil-rich phases), in qualitative agreement with other results. We also investigate the dynamic relaxation in the microemulsion phase. It has been suggested that the temporal relaxation in the microemulsion phase may be described by a stretched exponential Kolrausch-Williams-Watts law. In our model, we find the velocity-velocity autocorrelation function fits this law, showing both enhanced (b>1) and inhibited (b<1) diffusion.

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