Mesh size effect on CFD simulation of gas-fluidized Geldart A particles

Snapshots of fluidized bed solid packing contours in pseudo steady state for inlet velocities in a range of 4-12 mm/s using the Gidaspow drag law. Dilute regions are clearly visible only for 8 mm/s and higher velocities. Set (a) are for the 4 mm × 4 mm mesh size and set (b) are for the 1 mm × 1 mm mesh size.