Abstract: The flow behaviors of an electrorheological (ER) fluid between two parallel transparent electrodes are studied experimentally Some new phenomena caused by electric field induced non homogeneously solification ae found, such as solid phase accumulation and saturation process, instability and anisotropism, of ER rivers, which has provided the experimental basis for further understanding of the mechanical behaviors of ER fluids and setting up a new theoretical model of ER valves instead of the present iso...