Problem 15: Pepper Pot

“If you take a salt or pepper pot and just shake it, the contents will pour out relatively slowly. However, if an object is rubbed along the bottom of the pot, then the rate of pouring can increase dramatically. Explain this phenomenon and investigate how the rate depends on the relevant parameters.”

I. Phenomenon Demonstration

  • Coniglio, Antonio & Fierro, Annalisa & Herrmann, H. & Nicodemi, Mario. (2004). Unifying Concepts in Granular Media and Glasses.

II. Books, Encyclopedia, Discussion and Forum Posts

III. Research Papers