(456e) Modeling Cohesive Powder Flow in a Rotating Drum Using the Finite Element Method and a Mohr-Coulomb Material Model

Authors: 
Paul, A., Purdue University
Gonzalez, M., Purdue University
Wassgren, C. R., Purdue University
Elias, G., Purdue University
Liu, Y., The Dow Chemical Company
A Coupled Eulerian-Lagrangian finite element method (FEM) model assuming Mohr-Coulomb (MC) material behavior is developed to simulate the flow of cohesive powder in a rotating, circular drum. The MC properties used in the model are obtained from shear cell tests of microcrystalline cellulose. Corresponding rotating drum experiments using microcrystalline cellulose are also performed. The same binary image processing algorithm is used to capture the free surface changes from experiments and simulations. The free surface changes are characterized by the avalanche frequency for a constant rotation speed of the drum. The two sets of results are compared for various operating conditions.