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Temperature-Pressure Scaling for Air-Fluidized Grains near Jamming.
MedLine Citation:
PMID:  22540726     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We present experiments on a monolayer of air-fluidized beads in which a jamming transition is approached by increasing pressure, increasing packing fraction, and decreasing kinetic energy. This is accomplished, along with a noninvasive measurement of pressure, by tilting the system and examining behavior versus depth. We construct an equation of state and analyze relaxation time versus effective temperature. By making time and effective temperature dimensionless using factors of pressure, bead size, and bead mass, we obtain a good collapse of the data but to a functional form that differs from that of thermal hard-sphere systems. The relaxation time appears to diverge only as the effective temperature to pressure ratio goes to zero.
Authors:
L J Daniels; T K Haxton; N Xu; A J Liu; D J Durian
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Publication Detail:
Type:  Journal Article     Date:  2012-03-30
Journal Detail:
Title:  Physical review letters     Volume:  108     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-04-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  138001     Citation Subset:  IM    
Affiliation:
Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396, USA.
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