Influence of friction on granular segregation. Ulrich, S., Schröter, M., & Swinney, H. L. Physical Review E, October, 2007. arXiv: 0706.3390
Influence of friction on granular segregation [link]Paper  doi  abstract   bibtex   
Vertical shaking of a mixture of small and large beads can lead to segregation where the large beads either accumulate at the top of the sample, the so called Brazil Nut effect (BNE), or at the bottom, the Reverse Brazil Nut effect (RBNE). Here we demonstrate experimentally a sharp transition from the RBNE to the BNE when the particle coefficient of friction increases due to aging of the particles. This result can be explained by the two competing mechanisms of buoyancy and sidewall-driven convection, where the latter is assumed to grow in strength with increasing friction.
@article{ulrich_influence_2007,
	title = {Influence of friction on granular segregation},
	volume = {76},
	issn = {1539-3755, 1550-2376},
	url = {http://arxiv.org/abs/0706.3390},
	doi = {10.1103/PhysRevE.76.042301},
	abstract = {Vertical shaking of a mixture of small and large beads can lead to segregation where the large beads either accumulate at the top of the sample, the so called Brazil Nut effect (BNE), or at the bottom, the Reverse Brazil Nut effect (RBNE). Here we demonstrate experimentally a sharp transition from the RBNE to the BNE when the particle coefficient of friction increases due to aging of the particles. This result can be explained by the two competing mechanisms of buoyancy and sidewall-driven convection, where the latter is assumed to grow in strength with increasing friction.},
	number = {4},
	urldate = {2015-05-11TZ},
	journal = {Physical Review E},
	author = {Ulrich, Stephan and Schröter, Matthias and Swinney, Harry L.},
	month = oct,
	year = {2007},
	note = {arXiv: 0706.3390},
	keywords = {Condensed Matter - Disordered Systems and Neural Networks, Condensed Matter - Soft Condensed Matter}
}

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