TITLE

The first jamming crossover: Geometric and mechanical features

AUTHOR(S)
Ciamarra, Massimo Pica; Sollich, Peter
PUB. DATE
March 2013
SOURCE
Journal of Chemical Physics;Mar2013, Vol. 138 Issue 12, p12A529
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The jamming transition characterizes athermal systems of particles interacting via finite range repulsive potentials, and occurs on increasing the density when particles cannot avoid making contacts with those of their first coordination shell. We have recently shown [M. Pica Ciamarra and P. Sollich, e-print arXiv:1209.3334] that the same systems are also characterized by a series of jamming crossovers. These occur at higher volume fractions as particles are forced to make contact with those of subsequent coordination shells. At finite temperature, the crossovers give rise to dynamic and thermodynamic density anomalies, including a diffusivity anomaly and a negative thermal expansion coefficient. Density anomalies may therefore be related to structural changes occurring at the jamming crossovers. Here we elucidate these structural changes, investigating the evolution of the structure and of the mechanical properties of a jammed system as its volume fraction varies from the jamming transition to and beyond the first jamming crossover. We show that the first jamming crossover occurs at a well defined volume fraction, and that it induces a rearrangement of the force network causing a softening of the system. It also causes qualitative changes in the normal mode density of states and the spatial properties of the normal mode vectors.
ACCESSION #
86446772

 

Related Articles

  • The role of radial particle flow on power balance in DIII-D. Porter, G.D. // Physics of Plasmas;Dec98, Vol. 5 Issue 12, p4311 

    Investigates the role of radial particle on power balance in DIII-D. Value of the perpendicular thermal diffusivity at the separatrix; Reliance on the plasma density radial profile measurement; Relationship of the radial particle flux with the neutral pressure of the plasma

  • Lehmann rotation of cholesteric droplets subjected to a temperature gradient: Role of the concentration of chiral molecules. Oswald, P. // European Physical Journal E -- Soft Matter;Apr2009, Vol. 28 Issue 4, p377 

    We present a systematic study of the Lehmann rotation of cholesteric droplets subjected to a temperature gradient when the concentration of chiral molecules is changed. The liquid crystal chosen is an eutectic mixture of 8CB and 8OCB doped with a small amount of the chiral molecule R811. The...

  • Heterogeneous nucleation on mesoscopic wettable particles: A hybrid thermodynamic/density-functional theory. Bykov, T. V.; Zeng, X. C. // Journal of Chemical Physics;7/22/2002, Vol. 117 Issue 4, p1851 

    A hybrid thermodynamic and density-functional theory for heterogeneous nucleation on mesoscopic wettable particles is developed. The nonlocal density-functional theory (DFT) is on basis of the weighted-density approximation (WDA) of Tarazona. The model system consists of a Lennard-Jones (LJ)...

  • Thermal diffusion in disperse systems. Morozov, K. I. // Journal of Experimental & Theoretical Physics;May99, Vol. 88 Issue 5, p944 

    This paper discusses a theory for a new effect, the migration of solid dispersed particles initiated by a nonuniform temperature field. The reason for the motion is the inhomogeneity of the properties of a thin protective layer around a particle. The example of ionic dispersion shows that the...

  • Fluctuation-induced diffusive instabilities. Kessler, David A.; Levine, Herbert // Nature;8/6/1998, Vol. 394 Issue 6693, p556 

    Focuses on the formation of complex patterns in non-equilibrium systems. The propagation of an interface that is unstable to diffusive motion; Theoretical treatments of diffusive instabilities; Finite fluctuations in particle number that can be essential for such an instability to occur;...

  • The free energy of expansion and contraction: Treatment of arbitrary systems using the Jarzynski equality. Davie, Stuart J.; Reid, James C.; Searles, Debra J. // Journal of Chemical Physics;5/7/2012, Vol. 136 Issue 17, p174111 

    Thermodynamic integration, free energy perturbation, and slow change techniques have long been utilised in the calculation of free energy differences between two states of a system that has undergone some transformation. With the introduction of the Jarzynski equality and the Crooks relation,...

  • A kinetic analysis of thermal force on a spherical particle of high thermal conductivity in a monatomic gas. Soga, Takeo // Physics of Fluids (00319171);Apr86, Vol. 29 Issue 4, p976 

    A linearized version of the hierarchy kinetic model equation was solved by applying a singular perturbation method and the half-range Hermite polynomials. The solution retains correct results up to O(Kn2) and suggests that, if the thermal conductivity of the spherical particle is infinite and...

  • A small system grand ensemble method for the study of hard-particle systems. Soto-Campos, Gerardo; Corti, David S. // Journal of Chemical Physics;2/8/1998, Vol. 108 Issue 6, p2563 

    Presents an alternative statistical method for evaluating the thermodynamic properties of hard-particle systems. Basis on the small system grand canonical ensemble; Application of analytical techniques for the validity of the theory; Use of the theory for calculating the chemical potential of...

  • Thermodynamics of cavity formation in water and n-hexane using the Widom particle insertion method. Tomas-Oliveira, Isabel; Wodak, Shoshana J. // Journal of Chemical Physics;11/8/1999, Vol. 111 Issue 18, p8576 

    Discusses the use of the Widom particle insertion method to compute the free energy, enthalpy and entropy associated with the creation of empty cavities of different sizes in water and n-hexane. Computation of thermodynamic parameters; Zero change in internal energy in hexane and favorable in...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics