  Flow Models based on hyperbolic partial differential equations (conservation
laws) are a well-established approach for the material flow simulation. Until
now, they have been exclusively used for the simulation of cylindrical cargo.
This paper investigates the application of flow models on cubical cargo as a
new simulation approach for parcel logistics. Selected flow model parameters
are adapted to cover this new situation. The simulation results of this
macroscopic model are compared with the microscopic Discrete Element Method
(DEM) where the cargo is approximated by superquadrics. An experimental setup
especially designed for the validation of the considered flow model for cubical
cargo bulk flow is presented. Results of the flow model are analyzed and
validated against the results of experiment and DEM for the test setting.
