Author(s): S. M. Rubio-Largo, A. Janda, D. Maza, I. Zuriguel, and R. C. Hidalgo
The flow rate of grains from a silo depends on the stress field above the outlet and not on the free fall of grains from the bottom of the packed surface as had been previously thought.
[Phys. Rev. Lett. 114, 238002] Published Thu Jun 11, 2015