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Percolation current in a periodic segregation of a binary granular mixture
Shanshan Du1, Qingfan Shi, Gang Sun
1Key Laboratory of Cluster Science of Ministry of Education, and Department of Physics, Beijing Institute of Technology, 100081 Beijing, China.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 21, 2011
Summary
Vertical vibrations cause segregation in binary granular mixtures. Percolation time for alumina particles increases with their quantity, while percolation current decreases with more copper particles.
Area of Science:
- Granular physics
- Materials science
- Statistical mechanics
Background:
- Binary granular mixtures exhibit complex behaviors under external stimuli.
- Understanding segregation and percolation is crucial for material processing and geophysical phenomena.
- Vertical vibrations are known to induce various dynamic behaviors in granular systems.
Purpose of the Study:
- To investigate the phenomenon of periodic segregation in a binary granular mixture of alumina and copper spheres.
- To experimentally study the stable percolation process of alumina particles through a copper particle layer under vertical vibrations.
- To analyze the relationship between particle quantities and percolation time and current.
Main Methods:
- Subjecting a binary granular mixture (alumina and copper spheres) to controlled vertical vibrations.
- Experimentally measuring the percolation time of alumina particles through a copper particle layer.
- Quantifying the percolation current of alumina particles and its dependence on the number of both alumina and copper particles.
Main Results:
- A periodic segregation pattern was observed in the alumina-copper mixture during vertical vibrations.
- Percolation time of alumina particles through copper showed a linear increase with the number of alumina particles.
- Alumina percolation current was independent of alumina particle count but decreased monotonically with increasing copper particle count.
Conclusions:
- Vertical vibrations induce segregation and influence percolation dynamics in binary granular mixtures.
- The number of constituent particles significantly impacts percolation time and current.
- Further investigation into factors affecting percolation current is warranted.
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