Is there a critical acceleration for the onset of convection?
Abstract
Suppose granular material is shaken vertically with z(t)=A_0 cos(\omega_0 t). Can we expect to find convection if A_0\omega_0^2 < g? By means of theoretical analysis and computer simulation we find that there is no critical \Gamma=A_0\omega_0^2/g for the onset of convection. Instead we propose a modified criterion which coincides with \Gamma=1 for small frequency \omega_0.
 Publication:

arXiv eprints
 Pub Date:
 April 2002
 arXiv:
 arXiv:condmat/0204058
 Bibcode:
 2002cond.mat..4058P
 Keywords:

 Condensed Matter  Materials Science;
 Condensed Matter  Disordered Systems and Neural Networks
 EPrint:
 7 pages, 1 figure