Hi everybody! Does anyone knows where i can find more news about moving and deforming mesh feature in FLUENT 6.0? The guide has only one tutorial about a cranck compressor, but i need more about external flow, and especially on how to define the moving deforming zones with the UDF. Maybe someone of you has already worked on this new feature and can send me just some documents!!!

Thank you in advance!! Riccardo

hi,Riccardo I am going to do study using the moving and deforming mesh feature, but till now i have no idea on this. Would you like to tell me what are you going to do using this feature? I hope to consult and discuss with you. Would you like to give me a copy of the only one case file? Thank you anyway!

hi,Riccardo I am going to do study using the moving and deforming mesh feature, but till now i have no idea on this. Would you like to tell me what are you going to do using this feature? I hope to consult and discuss with you. Would you like to give me a copy of the only one case file? Thank you anyway!

bonny

Hi,

You got to have special license for using MDM feature in Fluent.The procedure to set up the case depends on your model. For example,if you are modelling a square cavity in which the inlet is moving,then

1)dynamic layering should be used for MDM method with appropriate layering constant.

2)the inlet is given a rigid body motion,the motion can be constant,or function of time defined through a profile file or through udf.

Hope this helps you.

sri

3

hi,sri

Thank you!

Now the MDM feature in Fluent can be used , but I don't have the only case file (cy13d.msh)in Fluent. If you have, would you like to give me a copy? And more examples on this feature? Because I am really a novice and I am urgent to use it.

I am looking forward to your reply. Thanks in advance!

Does anyone use moving and deforming mesh in FLUENT to move and deform a WING? There are always example for compressor.... but not for flying thing!!! Bye Riccardo

Hi Bonny,

I can pass on a simple MDM problem,but I was wondering where I can transfer them.Memory of the file would be a point of concern.

sri

hi,sri

Would you like to give me some examples on MDM?

thank you in advance!

bonny

Hi Bonny,

I did send you an example two days back to the email id you specified.

sri

Could you send also to me the example that you have? Thank you in advance!!! Riccardo

hi,sri Would you like to tell me the detail information on the setting of the BC of the example that you gave me a few days ago ? And the motion.c file? Because I cann't get result. Thank you very much!

Bonny

Hi sri, could you please send me a example that you have about moving deforming mesh? Thanks in advance!

Fuyou

Hello, I also need the example that you have about moving deforming mesh? please send it to my e-mail.

Thanks.

Torn

[sharifi.fatemeh]

Hi sri,
could you please send me a example that you have about moving deforming mesh in fluent
my case is exactly the same as you mention it before.i want to model a square cavity which the top face of it moves with the function like sin(1000*t). i want to model this cavity with dynamic mesh in fluent. i see this warning " incorrect grid motion UDF unsteady_velocity on zone 6 (assuming no motion)" when i want to link my udf to my dynamic mesh zone. what should i do in order to remove this warnings.is it necessary to have any boundary condition?
i will appreciate any recommendation of you.my email is:sharifi.fatemeh@gmail.com

Thanks in advance!

fatemeh sharifi

[renatovj]

Hi fatemeh sharifi,

Have you solved this problem yet?

I'm facing the same and don't know how to fix it.

Tranks!

[sharifi.fatemeh]

Hi,

I suppose I fixed it. but it belongs to many years ago

[renatovj]

No problem, I undestand!

This problem occurs when I hook the UDF under Dynamic Mesh-Dynamic Zones-User Defined.

When I change User Definer per Rigid Body, there is no Warning, but the solution diverges:

# Divergence detected in AMG solver: pressure coupled -> Decreasing coarsening group size!
# Divergence detected in AMG solver: pressure coupled -> Increasing relaxation sweeps!

Error: Divergence detected in AMG solver: pressure coupled

Error: Divergence detected in AMG solver: pressure coupled
Error Object: #f

I'm solving a problem of a simple cylinder moving due the forces the water does on it.

Do you know what I need to specify to the fluid zone around the wall (the cylinder) in order to avoid the solution to diverge?

Thanks!

[acasas]

Maybe this could help. The mesh files and the udf files are available if you look through the web.

https://www.youtube.com/watch?v=WaeTWZWdI9M

http://www.cae-club.ru/sites/default...alling-box.pdf

http://chamilo2.grenet.fr/inp/course...al13/tut13.pdf

good luck

[roopesh99]

Dear Friend,
Can you send it in my mail roopesh99@gmail.com, i have its urgent need.
Thanking you

Originally Posted by sri
;102597

Hi Bonny,

I can pass on a simple MDM problem,but I was wondering where I can transfer them.Memory of the file would be a point of concern.

sri