scholarly journals Static and dynamic critical behavior of a symmetrical binary fluid: A computer simulation

2006 ◽  
Vol 125 (2) ◽  
pp. 024506 ◽  
Author(s):  
Subir K. Das ◽  
Jürgen Horbach ◽  
Kurt Binder ◽  
Michael E. Fisher ◽  
Jan V. Sengers
Keyword(s):  
Computer Simulation ◽  
Critical Behavior ◽  
Binary Fluid

Tunneling and Percolation Behavior in Granular Metals

1990 ◽  
Vol 195 ◽  
Author(s):  
I. Balberg ◽  
N. Wagner ◽  
Y. Goldstein ◽  
S.Z. Weisz
Keyword(s):  
Computer Simulation ◽  
Critical Behavior ◽  
Quantum Mechanical ◽  
Electrical Noise ◽  
Quantum Mechanical Tunneling ◽  
Percolation Process ◽  
Percolation Behavior ◽  
Metallic Grains ◽  
First Time ◽  
Special Case

ABSTRACTThe nature of the percolation process in granular metals is examined for the first time by a computer simulation of a system of metallic grains embedded in an insulating matrix. Assuming that the intergrain conduction is due to quantum mechanical tunneling it is found that a percolation-like critical behavior of the conductivity is obtained, but that a percolation universal behavior will be found only in a very special case. In contrast, the behavior of the electrical noise does not deviate substantially from the universal one. Comparison of these results with recent experimental observations suggests that in the metallic range, both transport properties are controlled by the continuous metallic network rather than by intergrain tunnelin.. We propose that the metallic network resembles the previously studied system of ‘inverted random voids’.

SELF-ORGANIZED CRITICAL BEHAVIOR OF TWO-DIMENSIONAL FOAMS

Fractals ◽  
1996 ◽  
Vol 04 (03) ◽  
pp. 339-348 ◽  
Author(s):  
KYOZI KAWASAKI ◽  
TOHRU OKUZONO
Keyword(s):  
Surface Tension ◽  
Computer Simulation ◽  
Critical Behavior ◽  
Applied Strain ◽  
Two Dimensional ◽  
Self Organized ◽  
Self Organized Criticality ◽  
Simple Dynamical Model ◽  
Earthquake Models ◽  
Foam Rheology

A simple dynamical model for two-dimensional dry foam rheology is constructed for which surface tension effects and viscous dissipation at Plateau borders (intersections of three cell boundaries) are taken into account and is studied by computer simulation. Under externally applied shear strain increasing at small rates, the system exhibits avalanche-like release of stress that has been accumulating under increasing strain. There is a close similarity with earthquake models that show self-organized criticality (SOC). We discuss related simulation of two-dimensional wet foams under statically applied strain by Hutzler et al. [Phil. Mag. B71, 277 (1995)] showing critical behavior.

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