Light-Scattering Study of a Critical Mixture with Shear Flow

Abstract

We report the first light-scattering study of a critical mixture (aniline-cyclohexane) under shear flow $S$ which affects critical fluctuations with relaxation time $\tau$ only in the region $S\tau >1\mathrm{}$. All anomalies can be expressed as a function of $S\tau$ only and can be interpreted by a lowering of the critical temperature $\Delta T_0\mathrm{}\left(S\right)=T_1{S}^{\frac{1}{3\nu }}$, where $T_1$ is a constant. In addition the scattered light is found to exhibit a noticeable anisotropy with respect to the flow direction.