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Dynamical heterogeneity in soft-particle suspensions under shear
Physical Review E
We present experimental measurements of dynamical heterogeneities in a dense system of microgel spheres, sheared at different rates and at different packing fractions in a microfluidic channel, and visualized with high speed digital video microscopy. A four-point dynamic susceptibility is deduced from video correlations, and is found to exhibit a peak that grows in height and shifts to longer times as the jamming transition is approached from two different directions. In particular, the timedoi:10.1103/physreve.84.021403 pmid:21928990 fatcat:3mgqe5iupzcgfar6o6jtgflgei