Hi every one. Can FLUENT v.6 simulate a 2d gas-solid fluidized bed system??

Now my problem is that cannot define the bottom plate, gas inlet boundary condition. Which boundary type should i choose??

thank you

Yes it can. In the manual there is an example. Start with that one.

Nancy

i think my question is not very clear.

now the problem i donnt my domain is correct or not. i use gambit to bluid the 2d model, which has 2faces, top and bottom. for the bottom edge, i mean the edge which will represent the plate for flow inlet, what boundary condition should i use, wall? pressure inlet??

thank you

Hope I understand your prob correctly. You want to model a fluidised bed where the gas/air is injected from the bottom? In that case, you can use inlet BC (you should consider multiple inlet, I mean several injection points)

Nancy

i don not believe you have to define several injection points. if you have one boundary you define just one boundary condition. defining several injection point for the same boundary might confuse the solver and you may not see convergence. alternatively, you could define a velocity profile with UDFs.

You can use porous jump b.C. or try with "source term" option. Hope it works.

But I am modeling a 2D bed.... I dont think I can choose porous jump as the B.C.....