Regensburg 2007 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 17: Glass II (joint session with DF)
DY 17.10: Vortrag
Dienstag, 27. März 2007, 17:30–17:50, H23
The Jamming Transition in Granular Systems — •Matthias Sperl1, Trushant Majmudar1, Stefan Luding2, and Robert Behringer1 — 1Duke University — 2TU Delft
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, φc. Above φc, Z and the pressure, P, are predicted to increase as power laws in φ−φc. In experiments using photoelastic disks we corroborate a rapid increase in Z at φc and power-law behavior above φc for Z and P. Specifically we find power-law increase as a function of φ−φc for Z−Zc with an exponent beta around 0.5, and for P with an exponent ψ around 1.1.