Details

Autor(en) / Beteiligte

• Head, David A

Titel

Critical scaling and aging in cooling systems near the jamming transition

Ist Teil von

• Physical review letters, 2009-04, Vol.102 (13), p.138001-138001, Article 138001

Ort / Verlag

United States

Erscheinungsjahr

2009

Quelle

APS - PROLA

Beschreibungen/Notizen

• We conduct athermal simulations of freely cooling, viscous soft spheres around the jamming transition density varphi(J) and find evidence for a growing length xi(t) that governs relaxation to mechanical equilibrium. xi(t) is manifest in both the velocity correlation function and the spatial correlations in a scalar measure of local force balance which we define. Data for different densities varphi can be collapsed onto two master curves by scaling xi(t) and t by powers of |varphi-varphi(J)|, indicative of critical scaling. Furthermore, particle transport for varphi>varphi(J) exhibits aging and superdiffusion similar to a range of soft matter experiments, suggesting a common origin. Finally, we explain how xi(t) at late times maps onto known behavior away from varphi(J).