We study the order-disorder transition in colloidal suspensions under shear flow by performing Brownian dynamics simulations. We characterize the transition in terms of a statistical property of time-dependent maximum value of the structure factor. We find that its power spectrum exhibits the power-law behaviour only in the ordered phase. The power-law exponent is approximately -2 at frequencies greater than the magnitude of the shear rate, while the power spectrum exhibits the 1/f-type fluctuations in the lower frequency regime.
@article{arxiv.0706.4386,
title = {The order-disorder transition in colloidal suspensions under shear flow},
author = {Masamichi J. Miyama and Shin-ichi Sasa},
journal= {arXiv preprint arXiv:0706.4386},
year = {2008}
}
Comments: 11 pages, 10 figures, v.2: We have made some small improvements on presentations