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CFX mesh refining and stiffening

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Old   September 2, 2008, 04:39
Default CFX mesh refining and stiffening
  #1
george
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hi,

i was trying to model a transient simulation and it seems i need to refine my mesh more than I have now. I'm using a CFX mesh. I set my relevance center to 'fine', and i changed my relevance to 100 (which is the max). could anyone of you please tell me how to refine my mesh further with the mesh model as CFX mesh itself.

also, if I want to stiffen my mesh more, what can I change in CFX? (to make my model more stable at higher deformations)

thank you in advance.

george
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Old   September 2, 2008, 19:41
Default Re: CFX mesh refining and stiffening
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Glenn Horrocks
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Hi,

Change the element size from "Default" to a number. Then you can tell it what target mesh size to go for.

What do you mean to "stiffen the mesh" and "more stable at higher deformations"?

Glenn Horrocks
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Old   September 3, 2008, 00:20
Default Re: CFX mesh refining and stiffening
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george
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Hi,

First of all, thanks Glenn for quickly responding to my query.

I'm still waiting to try the mesh refinement you suggested.

Regarding the mesh stiffening, I'm running an IC engine simulation with cylinder volume deformation with high values of pressure. My simulation seems to be crashing almost after the combustion, and I thought of making the mesh for stiff so that the simulation could be more stable. I was wondering how I can do that, and I tried to do something in CFX mesh, but couldn't find anything specific.

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Old   September 3, 2008, 06:31
Default Re: CFX mesh refining and stiffening
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george
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Hi Glenn,

I tried changing the element size, but doesn't seems to work. The mesh remains the same.

The default value was 0.

I changed it to 5, 10, 20 - no changes observed

Then I tried to vary b/w 0.001 to 0 - no changes observed

Is this is the way you suggested me to do?, or I went wrong somewhere?

George

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