煤量甏圆家重点实验宝 §2. Hydrodynamics 1. Fluidization Region 1)Packed bed(fixed bed) no relative move between particles △P 150 2 F+1751-20 (5-1) Where o -spherisity of particles surface of sphere with same volume as particle/real surface National Lab, of Coal Combustion. HUST Wuhan 430074 P R CHINA E-mail:pcbnlcc@hust.edu.cnNL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn §2. Hydrodynamics 1. Fluidization Region 1) Packed bed (fixed bed) no relative move between particles ( ) ( ) p f g p d U d U L P         2 2 2 3 2 1 1.75 1 150 − + − =  (5-1) Where  - spherisity of particles = surface of sphere with same volume as particle/real surface