CFD Simulation of a Fluidized Bed

Simulation of a Bubbling Fluidized Bed Column. Sand-like particles, velocity increasing in steps every second.

BSc Research, by Waldo Rosales Trujillo, March 2006

Category:

Science & Technology

Tags:

• Fluidized bed
• CFD
• FLUENT
• fluent
• simulation

[bikeflat1]

is the solid-phase modeled as lagrangian or eulerian? if lagrangian how many particles you using here? cheers.

[xeusater]

@bikeflat1 It's Eulerian approach, there's no way to model dense fluidized beds with the Lagrangian, (that I know, anyway)

[xeusater]

Geldard B, sand 3600kg/m^3, and 550µm diameter

[nemesispussy]

how did u input the commands for the UDF in order to make it increase in steps

[xeusater]

first you need to get the real flow time, in my case it was from 0 to 9s, approx. Then you get the real part of the time [0, 1,2, 3, etc] and use it as a coefficient to multiply a given initial value of velocity.

For example, for the first second of simmulation: V = 0.1 m/s * [0 (time) + 1] = 0.1m/s

and then for the 2nd second:

V = 0.1 m/s *[1 (time) +1] = 0.2 m/s

Best Regards and happy simulation

[filosofemus]

Could you send your models to my mail filosofem@mail.ru. please I am really intresting in fluidized bed furnaces.

[bikeflat1]

@xeusater It is possible you just need the cpu capability to do it. Thanks for the reply, nice simulation. I've got some lagrangian fluidized bed simulations on my account if you want to check them out.

[arman6082]

Could you please show me the link of documentation of this work (any type) ?

[xeusater]

I am using Syamlal-Obrien drag force. Nope, I dont have a UDF example. But I think there's one example in the FLUENT tutorials.

[shoebkhan4u]

THE COMMAND U GIVE ABOVE IS NOT WORKING IN THE BOUNDRAY CONDITION WITH GAS INLET VELOCITY , HOW TO MODYFY IT SO THAT IT WORKS THERE.

ERROR ""Y-Velocity (m/s) : 0.1*[1(time)+1] is invalid - real value(s) required""

PLZ HELP

THANKS IN ADVANCE