Abstract
Transient response of model ER suspensions to step-wise electric field under steady shear flow is studied by numerical simulations. The electrically induced stress increases almost linearly with time up to the steady-state value, and this increase directly reflects the growth of the chain-like clusters of the dispersed particles. As the shear rate increases, the response becomes faster since the growth rate of the clusters increases and the steady-state length of the clusters decreases. The response also becomes faster by increasing the particle density or electric field, but the dependence on the field strength is rather weak.
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