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-   -   Dynamic meshing of impeller using fluent (http://www.cfd-online.com/Forums/fluent/92554-dynamic-meshing-impeller-using-fluent.html)

shadyenany September 17, 2011 21:51

Dynamic meshing of impeller using fluent
 
Could any body tell me how can I do dynamic meshing for a stirred tank (membrane bio-reactor) ?!!!! I Really need a tutorial urgently and I can't fine any!

Thanks

Far September 18, 2011 04:42

you don't need to use the dynamics meshing for such type of simulation. use sliding mesh or MRF algorithm

shadyenany September 19, 2011 20:46

Quote:

Originally Posted by Far (Post 324547)
you don't need to use the dynamics meshing for such type of simulation. use sliding mesh or MRF algorithm

so how can I apply the sliding mesh in fluent? have you got any tutorial please?!! urgently!!!

I've got a tutorial which tells that I need to download sliding mesh c file and extract it in the working directory, and I did that however I don't know what to do after that...!!! because am simulating a stirred tank with impeller inside. I've done everything in gambit however I can't define the moving parts in Fluent!

Please Help

Far September 22, 2011 15:08

no need of c file as per my knowledge. please past pics of your problem

shadyenany September 22, 2011 16:43

2 Attachment(s)
Quote:

Originally Posted by Far (Post 325273)
no need of c file as per my knowledge. please past pics of your problem

I hope this is clear enough, the problem now is that I don't know what shall I define the impeller as (boundary condition) in Gambit? as well as in Fluent?

notice that the impeller is working (rotates) only during the mixing process where is no air is provided by the membranes inside, so the question is shall I define the membranes in this stage as walls or porous zones?!

waiting for reply and feel free for any inquires.. thanks

Far September 22, 2011 16:50

This is very much clear that in the frozen rotor or sliding mesh algorithm we would be providing no slip wall for the impeller. The boundary condition specifying the rotation, goes to the fluid as opposed to the dynamic meshing

shadyenany September 22, 2011 16:56

Quote:

Originally Posted by Far (Post 325281)
This is very much clear that in the frozen rotor or sliding mesh algorithm we would be providing no slip wall for the impeller. The boundary condition specifying the rotation, goes to the fluid as opposed to the dynamic meshing

can you clarify a bit more?!


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