FIELD-INDUCED STRUCTURAL EVOLUTION OF PARTICLE-BASED SUSPENSION

摘要

An experimental approach is employed by using transparent electrodes to investigate the column size distribution where an external electric field applied to a colloidal suspension is increased. The coarsening profile of ER suspension is strongly related to field strength, but is insensitive to particle size. In addition, the interaction among the suspended particles, i.e. the shear stress, corresponding to the mean column diameter is studied and the power-law dependence is found at low field range. However, this dependence is not valid when the field strength surpasses a threshold value.