The aim of this paper is the development of new models and/or the improvement of existing
numerical models, used for simulating granular flow in CFB (circulating fluidized bed)
recirculation systems. Most recent models follow the TFM (two-fluid model) methodology, but
they cannot effectively simulate the inter-particle friction forces in the recirculation system,
because the respective stress tensor does not incorporate compressibility of flow due to
change of effective particle density. As a consequence, the induced normal and shear …