1988 Volume 50 Issue 6 Pages 61-68
It is necessary to know the flow characteristics of grains in order to prevent troubles occurred in the facilities and plants where grains are handled and processed and to develop the new techniques to handle and process grains. In respect of powders and granular materials like grains, however, the mechanism of the flow is complex and it is difficult to measure the state of the flow, so we have not being able to even quantitatively describe the condition of the flow. Therefore, the aim of this study is to clarify the flow characteristics by considering the velocity distributions in the layer of grains flowing in an inclined open channel, that is a basic gravity flow. In this paper, by correlation techniques and using optical fibers for sending and receiving light, we developed the on-line instrument system by which the velocity distributions at the bottom and the side in the layer of grains flowing in an inclined open channel could be measured in one flowing, with high accuracy, in short time and at maximum 31 points almost without disturbing the flow.
