Granular Matter

, Volume 14, Issue 2, pp 283–288 | Cite as

Coarse graining for an impeller-driven mixer system

Original Paper


We apply a coarse graining approach developed by Isaac Goldhirsch to data acquired from a model of an impeller-driven mixer system. The experiment uses a bidisperse system of photoelastic particles in a quasi-2D system to determine local mass and momentum densities, velocities, granular temperatures, size concentration, and pressure. Raw data consist of high speed video images obtained with polarizers (to obtain particle-scale force data) and without polarizers (to obtain particle positions). We coarse grain the experimental data using a Gaussian coarse graining function, \({\phi}\) , of variable width, w.


Coarse graining Mixing Shear flow 


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Abram H. Clark
    • 1
  • Paul Mort
    • 2
  • Robert P. Behringer
    • 1
  1. 1.Department of PhysicsDuke UniversityDurhamUSA
  2. 2.Procter & GambleCincinnatiUSA

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