Moving mesh
 

Hello,

I would like to simulate a flow crossing an orifice and to take into account the deformation of the wall. I think that I should use a moving mesh.
Could be possible to do it with StarCCM+?
How I have to define my mesh?

Thanks in advance.

Thomas.

Hi,
You can use motion modelling function, ie. mesh morpher or 6DOF. There are tutorials in the user guild (CCM+ 4.04).

Hi,

Many thanks for your reply.
Unfortunately I don't have the user guide 4.04. I have just the user guide 3.06.

Do you know where I can find it.

Thanks.

Thomas.

I have a copy, it is a 157MB file however, do you have a drop-box account?

That's great if you can send me a copy.
I don't have a drop-box account.
It is easy to create an account?

Thanks.

Thomas

4.04 is already avaible? Last version is 4.02.11?!

4.04 was announced and is available via cd-adapco user services. Latest version is 4.04.011

Sure? I talked with the support and they told me 4.04 isn't avaible yet.

Yes sure. It is still available on User Services FTP area. Announcement email was from July 13th

Hi all,

I don't manage to generate my moving mesh. I would like to take into account the deformation of the wall (of the orifice). I would like to move my mesh according the pressure on the wall.

If somebody have an advice.

Thanks.

Thomas.

Hi, CCM+ can calculate the stress in the wall material due to the fluid pressure, but I am almost sure that it can not solve the deformation of the wall caused by it.

King regards, Diego.

Hmm with the wand stress you could be able to run a FEM to get the deformation?!

I have never did it, but I think it is possible. In the morpher model you can specify LinearDisplacement for a boundary, and give it a constant value, a field function, values from tables... So with a FEM solver and generating a table probably you could do it. Maybe not in a full coupled way ( fluid -> structure -> fluid...) automatically, but you could give it at least an iteration (assuming the pressure distribution in the deformed mesh is the same as in the undeformed) by hand.

Thanks for your reply.

Yes I can with the morpher model specify LinearDisplacement for a boundary. I can generate a table with a FEM solver but in order to have accurate results I need to update my table according the variation of pressure on the wall due to its deformation ( fluid -> structure -> fluid -> structure -> fluid...)
So It is not useful.

Maybe I can create a macro...

I think you can use the "export" function to export for every step your results. That should work good.

Yes could be a good idea.
I will try.

Thomas.