ANOMALOUS VISCOUS LOSS IN EMULSIONS

We propose a model for concentrated emulsions based on the speculation that a macroscopic shear strain does not produce an affine deformatio n in the randomly close-packed droplet structure. The model yields an anomalous contribution to the complex dynamic shear modulus that varie s as the square root of frequency. We test this prediction using a nov el light scattering technique to measure the dynamic shear modulus, an d directly observe the predicted behavior over six decades of frequenc y and a wide range of volume fractions.