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-   -   For shrinkage simulation (http://www.cfd-online.com/Forums/flow-3d/71720-shrinkage-simulation.html)

zhoule0130 January 13, 2010 01:37

For shrinkage simulation
 
1 Attachment(s)
I want to simulate the shrinkage for gravity casting. I have the .stl file of the castings (shown in the attachment).

For flow3D, it cant allow use multi-mesh to simulate the shrinkage, but I want to use it, because it can conform the real situation.

So how can I solve for this problem?

MuxaB January 20, 2010 12:30

Quote:

Originally Posted by zhoule0130 (Post 242372)
I want to simulate the shrinkage for gravity casting. I have the .stl file of the castings (shown in the attachment).

For flow3D, it cant allow use multi-mesh to simulate the shrinkage, but I want to use it, because it can conform the real situation.

So how can I solve for this problem?

You are right that currently, the shrinkage model only works in a one mesh block environment. What you can do to minimize your mesh is use the domain removing geometry components, IFOB()=5. All mesh inside these components is removed from memory and calculation.

zhoule0130 May 15, 2010 16:11

1 Attachment(s)
Quote:

Originally Posted by MuxaB (Post 243184)
You are right that currently, the shrinkage model only works in a one mesh block environment. What you can do to minimize your mesh is use the domain removing geometry components, IFOB()=5. All mesh inside these components is removed from memory and calculation.


Thank you. but i dont understand ifob()=5? how can i set it?
i can upload the .stl file to you.
Can i have any contact of you?

My email address is : le.zhou@gkss.de

Thank you very much!

MuxaB May 15, 2010 18:21

Quote:

Originally Posted by zhoule0130 (Post 258938)
Thank you. but i dont understand ifob()=5? how can i set it?
i can upload the .stl file to you.
Can i have any contact of you?

My email address is : le.zhou@gkss.de

Thank you very much!

Zhou,

You need to define a new component with the shape of the region you want to deactivate and call it Domain Removing in the GUI, which translates to the setting of IFOB(n)=5 for that component #n. All cells blocked by this component will be deactivated.

How come you are using such an old version of FLOW-3D?

zhoule0130 May 20, 2010 19:35

Quote:

Originally Posted by MuxaB (Post 258946)
Zhou,

You need to define a new component with the shape of the region you want to deactivate and call it Domain Removing in the GUI, which translates to the setting of IFOB(n)=5 for that component #n. All cells blocked by this component will be deactivated.

How come you are using such an old version of FLOW-3D?


Thanks your replying!
and i have another question, that is how can i model thermal stress using elastic model. I read a paper about the hot tearing, the author used the Magama software to simulate the hot tearing and the damage. they cna get the vov mise stress, and other data which is useful prediction the hot tearing susceptibility.

zhoule0130 May 20, 2010 19:46

Quote:

Originally Posted by MuxaB (Post 258946)
Zhou,

You need to define a new component with the shape of the region you want to deactivate and call it Domain Removing in the GUI, which translates to the setting of IFOB(n)=5 for that component #n. All cells blocked by this component will be deactivated.

How come you are using such an old version of FLOW-3D?


because of limited of upload, i cant upload the paper for you , so i list the name of the paper:
prediction of hot tear formation ina magnesium alloy permanent mold cating.
This is subject of my PhD, so i really want helo from you.
I think flow3d can do it also.
Thank you very much!

MuxaB June 9, 2010 15:27

Hi Zhou,

There is not enough room on thvis forum to explain such a broad topic as modeling stresses and strains in FLOW-3D. This capability has become available in version 9.2.

I suggest contacting your FLOW-3D support to get the information.

therockyy November 11, 2010 10:17

Quote:

Originally Posted by MuxaB (Post 258946)
Zhou,

You need to define a new component with the shape of the region you want to deactivate and call it Domain Removing in the GUI, which translates to the setting of IFOB(n)=5 for that component #n. All cells blocked by this component will be deactivated.

How come you are using such an old version of FLOW-3D?

'cause there is pirated version of Flow-3D v9.3 online... It's just a guess


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