The authors have recently studied the reology of a mixture of small glass spheres and a glycerol solution in water. Strarting from a set of experiments, carried out at the University of Bologna as accurately as possible, they have proposed a light adjustment of the Bagnold's model that seems to bring a satisfactory agreement between theory and the experimental data. The proposed model belongs anyway to the group of models that do not distinguish between the two phases (liquid and solid), presenting the above mentioned problems for the limit cases. The same authors present here a possible further adjustment of the rheological model that takes into account the two different phases and that seems to work at least reasonably for the above mentioned limit cases.
Two-phase model for plane shear of dense granular flow
SCHIPPA, Leonardo
2000
Abstract
The authors have recently studied the reology of a mixture of small glass spheres and a glycerol solution in water. Strarting from a set of experiments, carried out at the University of Bologna as accurately as possible, they have proposed a light adjustment of the Bagnold's model that seems to bring a satisfactory agreement between theory and the experimental data. The proposed model belongs anyway to the group of models that do not distinguish between the two phases (liquid and solid), presenting the above mentioned problems for the limit cases. The same authors present here a possible further adjustment of the rheological model that takes into account the two different phases and that seems to work at least reasonably for the above mentioned limit cases.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
