Abstract
We have measured the flux of grains from a hole in the bottom of a shaken container of grains. We find that the peak velocity of the vibration, , controls the flux, i.e., the flux is nearly independent of the frequency and acceleration amplitude for a given value of . The flux decreases with increasing peak velocity and then becomes almost constant for the largest values of . The data at low peak velocity can be quantitatively described by a simple model, but the crossover to nearly constant flux at larger peak velocity suggests a regime in which the granular density near the container bottom is independent of the energy input to the system.
- Received 22 August 2005
DOI:https://doi.org/10.1103/PhysRevE.74.011306
©2006 American Physical Society