Jamming Transition in Granular Systems

✍ Scribed by Majmudar, T.; Sperl, M.; Luding, S.; Behringer, R.

• Book ID: 115440131
• Publisher: The American Physical Society
• Year: 2007
• Tongue: English
• Weight: 352 KB
• Volume: 98
• Category: Article
• ISSN: 0031-9007
• DOI: 10.1103/physrevlett.98.058001

✦ Synopsis

Recent simulations have predicted that near jamming for collections of spherical particles, there will be a discontinuous increase in the mean contact number Z at a critical volume fraction c . Above c , Z and the pressure P are predicted to increase as power laws in ÿ c . In experiments using photoelastic disks we corroborate a rapid increase in Z at c and power-law behavior above c for Z and P. Specifically we find a power-law increase as a function of ÿ c for Z ÿ Z c with an exponent around 0.5, and for P with an exponent around 1.1. These exponents are in good agreement with simulations. We also find reasonable agreement with a recent mean-field theory for frictionless particles.