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Atit October 20, 2004 10:28

3 bodies in 1 part
 
I create the domain as 1 part which contains 3 bodies. In CFX-Pre, I assign the volumetric heat source to B2.P3 (the 2nd body in the domain). When Solver run, the residues fluctuate and converge very slow. When I visualize the result in CFX-Post, I found that the source is at B3.P3 (the 3rd body in the domain). I check from the output file of Solver, it says that the source is at B2.P3. Then I run that definition file again after 10 loops, I stop Solver and see the result file in CFX-Post, the source is at B2.P3, then I run the definition file by Solver again. At about the 100th loop of the third adaptive mesh process, the residues fluctuate, then I stop Solver, and see the result in CFX-Pre. I found that the source is at B3.P3. This is very weird! Do anybody have an idea what wrong with my model? Thank you very much.

Atit

Atit October 22, 2004 05:28

Re: 3 bodies in 1 part
 
I would like to provide more information. I found that when I sketch the bodies in XZ plane then extrude it, the source is fixed at B2.P3. However when I sketch the bodies in YZ plane then revolve it, the source will be transfer to B3.P3 after some loops in Solver. However, some models that will be testing are easier to create by sketching in YZ than sketching in XZ plane. Thank you for your consideration.

Atit

jon October 22, 2004 06:11

Re: 3 bodies in 1 part
 
Did you check yes in the Merge Parts field?

Atit October 22, 2004 08:29

Re: 3 bodies in 1 part
 
If you mean merge topology, I use 'yes' in details of revolve. Thank you.

Atit

Atit October 22, 2004 09:25

Re: 3 bodies in 1 part
 
Dear Jon, When you said 'Merge Part', did you mean 'Merge Part' in 'encloser'? In my model, the exit of the first body is the inlet of the second body, and the exit of the second body is the inlet of the third one. After creating the first body by 'revolve', I 'freeze' it. Then create the second body by 'revolve, and 'freeze' it. Finally, 'revolve' the third body. In this viewpoint, I would like the volumetric heat source to be at the first body. However it always change to be at the second body. I am not sure when will it transfer to the second body. I think it might be after the adaptive mesh process. I set three adaptive steps with velocity as the adaptive variable. Thank you.

Atit

jon October 22, 2004 10:55

Re: 3 bodies in 1 part
 
Yes, I mean merge part in enclosure.

Atit October 22, 2004 11:02

Re: 3 bodies in 1 part
 
As I explain in my forth message, I have nothing with encloser, haven't me? or do I have to set anything more? Thank you.

Atit

Atit October 22, 2004 14:41

Re: 3 bodies in 1 part
 
I found that if I don't use adaptive mesh, the source doesn't transfer.

Atit


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