Details

Autor(en) / Beteiligte

• Majmudar, T S
• Sperl, M
• Luding, S
• Behringer, R P

Titel

Jamming transition in granular systems

Ist Teil von

• Physical review letters, 2007-02, Vol.98 (5), p.058001-058001, Article 058001

Ort / Verlag

United States

Erscheinungsjahr

2007

Link zum Volltext

Quelle

American Physical Society

Beschreibungen/Notizen

• 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 phi(c). Above phi(c), Z and the pressure P are predicted to increase as power laws in phi-phi(c). In experiments using photoelastic disks we corroborate a rapid increase in Z at phi(c) and power-law behavior above phi(c) for Z and P. Specifically we find a power-law increase as a function of phi-phi(c) for Z-Z(c) with an exponent beta around 0.5, and for P with an exponent psi 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.