Mixing and condensation in a wet granular medium |
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Authors: | Geromichalos Dimitrios Kohonen Mika M Mugele Frieder Herminghaus Stephan |
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Institution: | Applied Physics Laboratory, Ulm University, Ulm, D-89069, Germany. Dimitrios.Geromichalos@physik.uni-ulm.dr |
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Abstract: | 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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