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Regensburg 2007 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 6: Glass II (joint session with DY)

DF 6.10: Vortrag

Dienstag, 27. März 2007, 17:30–17:50, H23

The Jamming Transition in Granular Systems — •Matthias Sperl1, Trushant Majmudar1, Stefan Luding2, and Robert Behringer11Duke 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 ZZc with an exponent beta around 0.5, and for P with an exponent ψ around 1.1.

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