Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 09, 2018 - September 12, 2018
Potato starch powder and aluminum oxide powder was put in a cylindrical container and the container was rotated around the horizontal axis. Inside the container was inserted a device that removed particles adhering to the wall surface, and it rotated at the same rotation speed as the container, but it was braked for a short time at a frequency of once per revolution. Thereby, the two kinds of powder were sufficiently stirred. By means of image analysis, the average value of the center-to-center distances from the nearest particles to each particle was determined. The center-to-center distance when the same number of particles were arranged as in the checkerboard was calculated. The ratio of these two distances was used as an index of stirring state. On the other hand, the value of index of stirring state when particles were randomly distributed was clarified. The ratio of these two indexes of stirring state represented whether the stirring state had reached the ideal state. It was confirmed that an ideal stirring state was obtained by the stirring method described above.
