1. Cocurrent down flow circulating fluidized bed (downer) reactors a state-of-the-art review;Zhu;Canadian Journal of Chemical Engineering,1995
2. State of the art review of downer reactors;Jin,2002
3. Theory for cluster formation in vertically conveyed suspensions of intermediate density;Grace;Transactions of the Institution of Chemical Engineers,1979
4. Cluster and agglomerate formation in fluidized suspensions;Horio,1995
5. Particle clustering pattern and its relationship with the gas–solids behaviors in CFB riser and downer;Zhang,2004