Reference : Reversing the Brazil nut effect
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/18816
Reversing the Brazil nut effect
English
Ludewig, François mailto [Université de Liège - ULg > > Chimie inorganique structurale >]
Vandewalle, Nicolas mailto [Université de Liège - ULg > Département de physique > Physique statistique >]
Dec-2005
European Physical Journal E -- Soft Matter
Springer
18
4
367-372
Yes (verified by ORBi)
International
1292-8941
New York
[en] We propose a lattice model for studying the Brazil Nut Effect (BNE), i.e. the phase segregation occuring when a granular material is vertically shaked. The model considers the tap intensity and the mobility mu of the grains as the main physical parameters. Different mobilities for different grain species lead to segregation (BNE) patterns, reverse segregation (RBNE) patterns, "sandwhich" layered structures or vertical domains. A phase diagram (decompaction chi, mobility difference between both species Delta mu) is obtained in which the different phases are emphasized. In a narrow region of the diagram, different phases coexist. It is shown that the BNE segregation could be reversed by increasing the tap intensity or the characteristics of the grains. Numerical results are compared with earlier experimental works.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/18816

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