Mixing and Condensation in a Wet Granular Medium

  • Geromichalos D
  • Kohonen M
  • Mugele F
 et al. 
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We have studied the effect of small amounts of added liquid on the dynamic behavior of a granular system consisting of a mixture of glass beads of two different sizes. Segregation of the large beads to the top of the sample is found to depend in a nontrivial way on the liquid content. A transition to viscoplastic behavior occurs at a critical liquid content, which depends upon the bead size. We show that this transition can be interpreted as a condensation due to the hysteretic liquid bridge forces connecting the beads, and we provide the corresponding phase diagram.

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  • Dimitrios Geromichalos

  • Mika M. Kohonen

  • Frieder Mugele

  • Stephan Herminghaus

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