Subharmonic instability of a self-organized granular jet.

ABSTRACT: 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.

SUBMITTER: Kollmer JE 

PROVIDER: S-EPMC4802379 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature