Nowadays spout fluidized bed reactors are gaining immense attention of scientific community,
due to the unified characteristics both from the spouted and the fluidized bed reactors. In the
present work, we study the hydrodynamic behaviour (flow regime map) of a spout fluidized
bed reactor with draft plates. Furthermore, the effect of variation of the physical properties of
the particles, entrainment height and the bed aspect ratio on the overall flow development has
been investigated by experimental and numerical means. The experimental investigations
were performed through particle image velocimetry and digital image analysis, and the
obtained results were compared with a discrete particle model
