ScholarlyCommons

Title

Temperature-Pressure Scaling for Air-Fluidized Grains near Jamming

Author(s)

L. J. Daniels, University of Pennsylvania
T. K. Haxton, Lawrence Berkeley National Laboratory
N. Xu, University of Science and Technology of China
Andrea J. Liu, University of PennsylvaniaFollow
Douglas J. Durian, University of PennsylvaniaFollow

Document Type

Journal Article

Date of this Version

3-30-2012

Abstract

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.

Comments

Daniels, L. J., Haxton, T. K., Xu, N., Liu, A. J., & Durian, D. J. (2012). Temperature-Pressure Scaling for Air-Fluidized Grains near Jamming. Physical Review Letters, 108(13), 138001. doi: 10.1103/PhysRevLett.108.138001

© 2012 American Physical Society

Recommended Citation

Daniels, L. J., Haxton, T. K., Xu, N., Liu, A. J., & Durian, D. J. (2012). Temperature-Pressure Scaling for Air-Fluidized Grains near Jamming. Retrieved from https://repository.upenn.edu/physics_papers/248