Dense granular flow at the critical state: maximum entropy and topological disorder
After extensive quasi-static shearing, dense dry granular flows attain a steady-state condition of porosity and deviatoric stress, even as particles are continually rearranged. The paper considers two-dimensional flow and derives the probability distributions of two topological measures of particle arrangement—coordination number and void valence— that maximize topological entropy. By only considering topological dispersion, the method closely predicts the distribution of void valences, as measured in discrete element (DEM) simulations. Distributions of coordination number are also derived by considering packings that are geometrically and kinetically consistent with the particle sizes and friction coef- ficient. A cross-entropy principle results in a distribution of coordination numbers that closely fits DEM simulations.
Author Supplied Keywords
Granular material, Coordination number, Critical state, Entropy, MinXEnt, Shannon information
Discrete element method; Granular materials; Topological entropy
Citation: Pilot Scholars Version (Modified MLA Style)
Kuhn, Matthew R., "Dense granular flow at the critical state: maximum entropy and topological disorder" (2014). Engineering Faculty Publications and Presentations. Paper 25.
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