Contacts Dynamics across Jamming in a granular glass experiment

Details Contacts Dynamics across Jamming in a granular glass experiment Contacts Dynamics across Jamming in a granular glass experiment

2012-02-25

arxiv.org/abs/1202.5687v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

We study experimentally the vicinity of the Jamming transition by investigating the statics and the dynamics of the contact network of an horizontally shaken bi-disperse packing of photo-elastic discs. Compressing the packing very slowly, while maintaining a mechanical excitation, we produce a granular glass, namely a frozen structure of vibrating grains. Nevertheless, we observe in this glass phase a remarkable dynamics of the contact network, which exhibits strong dynamical hetero-geneities. Such heterogeneities are maximum at a packing fraction {\phi}\star, distinct and smaller than the jamming packing fraction {\phi}_{J}, which is indicated by the abrupt variation of the average number of contact per particle. We further demonstrate that the "dynamical transition" taking place at {\phi}\star originates in the spatial correlation of the coordination number. Our findings are discussed in the light of recent numerical and theoretical studies of thermal soft spheres.

Affiliated with

Also associated with

No associations

Rating

Contacts Dynamics across Jamming in a granular glass experiment does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Contacts Dynamics across Jamming in a granular glass experiment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contacts Dynamics across Jamming in a granular glass experiment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-291550