Measurement of Friction Coefficient on a Powder Layer and Fluid Dynamic Study

Starch

The following image is a magnified image of starch used in the experiments. We use a potato starch. 

A bulk density of the dogtooth violet starch is 0.65103kg/m3 when sieved and 0.80103kg/m3 when compressed.

Appendix Fig. 2. A magnified image of potato starch used in experiments. Click image for an enlarged view.