Jamming Transition in Granular Systems

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Majmudar, T.S. and Sperl, M. and Luding, S. and Behringer, R.P. (2007) Jamming Transition in Granular Systems. Physical Review Letters, 98 (5). ISSN 0031-9007

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Abstract: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 a power-law increase as a function of ϕ-ϕc for Z-Zc with an exponent β around 0.5, and for P with an exponent ψ 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.
Item Type:Article
Copyright:© 2007 American Physical Society
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Engineering Technology (CTW)
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Link to this item:http://purl.utwente.nl/publications/80325
Official URL:http://link.aps.org/doi/10.1103/PhysRevLett.98.058001
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