Abstract
The behavior of particulate materials in general particulate processes can not be discussed without the consideration of dynamic factors. For example, if the discharge valve of a particulate hopper is opened, it will be observed that the discontinuity boundary of the bulk density is transfered upward in it storage. This phenomenon is expected to be solved as one of the most urgent problems for the establishment of the systematic design method of a discharge valve, but has not been elucidated yet. From this standpoint, in this paper, the transmission mechanism of the bulk density in mobilized particulate materials is fundamentally and experimentally discussed. As a result, it is pointed out that the bulk density in mobilized particulate materials has the property of a kinematic wave.
