Dynamical Janssen effect
|
|
The apparent mass at the bottom of granular packing inside a vertical tube in relative motion is measured experimentally. We have demonstrated that, during the flow, a dynamical equilibrium is reached in the granular packing. We proved that Janssen's model is valid over a broad range of velocities and is verified even more precisely than in the static case. Moreover, a significant dependence on the relative humidity for the apparent mass has been demonstrated experimentally.

Publications
|
Influence of humidity on granular packings with moving walls |
[ | ] |
Y. Bertho, T. Brunet, F. Giorgiutti and J.-P. Hulin, Europhys. Lett. 67, 955-961 (2004) |
|
Dynamiques d'écoulements gaz/particules en conduite verticale |
[ | ] |
Y. Bertho, Thèse de l'École Polytechnique (2003) |
|
Dynamical Janssen effect on granular packing with moving walls |
[ | ] |
Y. Bertho, F. Giorgiutti and J.-P. Hulin, Phys. Rev. Lett. 90, 144301 (2003) |
|