Abstract
We carry out numerical simulations to study transport behavior about the jamming transition of a model granular material in two dimensions at zero temperature. Shear viscosity is computed as a function of particle volume density and applied shear stress , for diffusively moving particles with a soft core interaction. We find an excellent scaling collapse of our data as a function of the scaling variable , where is the critical density at (“point ”), and is the crossover scaling critical exponent. We define a correlation length from velocity correlations in the driven steady state and show that it diverges at point . Our results support the assertion that jamming is a true second-order critical phenomenon.
- Received 13 April 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.178001
©2007 American Physical Society