Spouted bed - Jet penetration / bubbling

bbmorales · February 12, 2013, 13:19

Hello there.

I am modelling a (spouted bed using a euler-euler granular model in Fluent 14.

Even though I am following the model choice of some paper which can reproduce quite well the experimental data, I cannot obtain a correct jet regime.

The authors of the experimental work state that the spouting regime starts around gas inlet velocity of 38 m/s, but in my simulation I cannot get any spouting.
Using around 41 m/s, the gas barely penetrates the solid bed. Using 55 m/s, a bubbling regime happens.

Any thoughts on it??

Thanks!!

mohsen0488 · October 7, 2013, 11:06

hi
i have a same problem,i want to modeling hydrodynamic of spouted bed my experimental reference is HE et al .
diameter of inlet=19mm
solid density=2500kg/m3
diameter of solid=1.41 mm
inlet velocity=41 m/s
H0=325mm
H=1000mm
initial volume fraction of solid=0.588
drag model= Gidaspow
other Authors reach spouting, in my simulation I cannot get any spouting.
did you solve your problem?
can you help me?

thank you in advance

February 12, 2013, 13:19	Spouted bed - Jet penetration / bubbling	#1
bbmorales New Member Bayard Morales Join Date: Aug 2009 Posts: 24 Rep Power: 17	Hello there. I am modelling a (spouted bed using a euler-euler granular model in Fluent 14. Even though I am following the model choice of some paper which can reproduce quite well the experimental data, I cannot obtain a correct jet regime. The authors of the experimental work state that the spouting regime starts around gas inlet velocity of 38 m/s, but in my simulation I cannot get any spouting. Using around 41 m/s, the gas barely penetrates the solid bed. Using 55 m/s, a bubbling regime happens. Any thoughts on it?? Thanks!!

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October 7, 2013, 11:06		#2
mohsen0488 Member mohsen Join Date: Sep 2013 Posts: 42 Rep Power: 13	hi i have a same problem,i want to modeling hydrodynamic of spouted bed my experimental reference is HE et al . diameter of inlet=19mm solid density=2500kg/m3 diameter of solid=1.41 mm inlet velocity=41 m/s H0=325mm H=1000mm initial volume fraction of solid=0.588 drag model= Gidaspow other Authors reach spouting, in my simulation I cannot get any spouting. did you solve your problem? can you help me? thank you in advance