Subharmonic instability of a self-organized granular jet

被引：0
|
作者：
Kollmer, J. E. [1 ]
Poeschel, T. [1 ]
机构：
[1] Univ Erlangen Nurnberg, Inst Multiscale Simulat, D-91054 Erlangen, Germany
来源：
SCIENTIFIC REPORTS | 2016年 / 6卷
关键词：
ONSET;
D O I：
10.1038/srep22520
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Downhill flows of granular matter colliding in the lowest point of a valley, may induce a self-organized jet. By means of a quasi two-dimensional experiment where fine grained sand flows in a vertically sinusoidally agitated cylinder, we show that the emergent jet, that is, a sheet of ejecta, does not follow the frequency of agitation but reveals subharmonic response. The order of the subharmonics is a complex function of the parameters of driving.
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页数：7
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