Moving mesh

tom-uk · July 13, 2009, 12:38

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.

anunu · July 14, 2009, 23:52

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

tom-uk · July 15, 2009, 04:25

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.

en51nm · July 15, 2009, 05:23

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

tom-uk · July 15, 2009, 05:37

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

Maddin · July 15, 2009, 10:23

4.04 is already avaible? Last version is 4.02.11?!

olauer · July 16, 2009, 05:11

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

Maddin · July 16, 2009, 05:15

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

olauer · July 16, 2009, 11:32

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

tom-uk · July 16, 2009, 12:21

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.

DiegoS · July 20, 2009, 17:46

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.

Maddin · July 20, 2009, 17:54

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

DiegoS · July 20, 2009, 18:05

Quote:

Originally Posted by Maddin

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.

tom-uk · July 21, 2009, 06:25

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...

Maddin · July 21, 2009, 06:39

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

tom-uk · July 21, 2009, 07:02

Yes could be a good idea.
I will try.

Thomas.

July 13, 2009, 12:38	Moving mesh	#1
tom-uk New Member thomas Join Date: Jun 2009 Location: Edinburgh Posts: 12 Rep Power: 16	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.

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July 14, 2009, 23:52		#2
anunu New Member Jiashing Liu Join Date: Mar 2009 Posts: 11 Rep Power: 17	Hi, You can use motion modelling function, ie. mesh morpher or 6DOF. There are tutorials in the user guild (CCM+ 4.04).

July 15, 2009, 04:25		#3
tom-uk New Member thomas Join Date: Jun 2009 Location: Edinburgh Posts: 12 Rep Power: 16	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.

July 15, 2009, 05:23		#4
en51nm New Member Nicholas Join Date: Jul 2009 Posts: 13 Rep Power: 16	I have a copy, it is a 157MB file however, do you have a drop-box account?

July 15, 2009, 05:37		#5
tom-uk New Member thomas Join Date: Jun 2009 Location: Edinburgh Posts: 12 Rep Power: 16	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

July 15, 2009, 10:23		#6
Maddin Senior Member Join Date: Mar 2009 Posts: 260 Rep Power: 18	4.04 is already avaible? Last version is 4.02.11?!

July 16, 2009, 05:11		#7
olauer Member Oliver Lauer Join Date: Mar 2009 Location: Coburg Posts: 57 Rep Power: 17	4.04 was announced and is available via cd-adapco user services. Latest version is 4.04.011

July 16, 2009, 05:15		#8
Maddin Senior Member Join Date: Mar 2009 Posts: 260 Rep Power: 18	Sure? I talked with the support and they told me 4.04 isn't avaible yet.

July 16, 2009, 11:32		#9
olauer Member Oliver Lauer Join Date: Mar 2009 Location: Coburg Posts: 57 Rep Power: 17	Yes sure. It is still available on User Services FTP area. Announcement email was from July 13th

July 16, 2009, 12:21		#10
tom-uk New Member thomas Join Date: Jun 2009 Location: Edinburgh Posts: 12 Rep Power: 16	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.

July 20, 2009, 17:46		#11
DiegoS New Member Diego Simón Davila Join Date: May 2009 Posts: 4 Rep Power: 16	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.

July 20, 2009, 17:54		#12
Maddin Senior Member Join Date: Mar 2009 Posts: 260 Rep Power: 18	Hmm with the wand stress you could be able to run a FEM to get the deformation?!

July 21, 2009, 06:25		#14
tom-uk New Member thomas Join Date: Jun 2009 Location: Edinburgh Posts: 12 Rep Power: 16	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...

July 21, 2009, 06:39		#15
Maddin Senior Member Join Date: Mar 2009 Posts: 260 Rep Power: 18	I think you can use the "export" function to export for every step your results. That should work good.

July 21, 2009, 07:02		#16
tom-uk New Member thomas Join Date: Jun 2009 Location: Edinburgh Posts: 12 Rep Power: 16	Yes could be a good idea. I will try. Thomas.