CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   CFX (http://www.cfd-online.com/Forums/cfx/)
-   -   Mashing Problem? (http://www.cfd-online.com/Forums/cfx/18846-mashing-problem.html)

ji March 3, 2002 01:31

Mashing Problem?
 
dear all,

I got this message in cfx 5.4.1 build when i try to mashing.

"Zero length stack generated"

and then I can not write the diffinition file.

But when I run the example such as staticMixer, I don't have this message.

dear all,

I got this message in cfx launcher when i try to run the solver

CFX-4 | Solver | forrtl: error (72): floating overflow

CFX-4 | Solver | Image PC Routine Line Source CFX-4 | Solver | psolvempiNT.exe 00687065 Unknown Unknown Unknown CFX-4 | Solver | psolvempiNT.exe 0062000B Unknown Unknown Unknown CFX-4 | Solver | psolvempiNT.exe 005BBB86 Unknown Unknown Unknown CFX-4 | Solver | psolvempiNT.exe 0053552B Unknown Unknown Unknown CFX-4 | Solver | psolvempiNT.exe 00492B77 Unknown Unknown Unknown CFX-4 | Solver | psolvempiNT.exe 0042D97E Unknown Unknown Unknown CFX-4 | Solver | psolvempiNT.exe 00419CE5 Unknown Unknown Unknown CFX-4 | Solver | psolvempiNT.exe 0040B73B Unknown Unknown Unknown CFX-4 | Solver | psolvempiNT.exe 0040541C Unknown Unknown Unknown CFX-4 | Solver | CFX-4 | Solver | Stack trace terminated abnormally. CFX-4 | Solver | runsolve4: Job completed CFX-4 | Solver | Output file : /CFX_Work/m93.fo CFX-4 | Solver | CFX-4 | Solver | Finished. CFX-4 | Solver |

What causes this and how do we avoid it? Thanks

Ji


Richard March 3, 2002 09:12

Re: Mashing Problem?
 
maybe you should change the time steps

Steve April 4, 2002 05:03

Re: Mashing Problem?
 
Hi Ji

The "zero stack length generated" error, is due to 3 sided surfaces which is poorly parameterised and has an edge length of zero.

Go to Geometry > Show > Surface, then highlight all surfaces and apply. Look down the list of surfaces and you will see the problem surfaces have 4 sides but 1 side is zero, therefore 3 sided.

There are 2 methods of solving this, join the problem surface with an adjoining surface to create a large trimmed surface, or re-create the surface as a trimmed surface.

You could also check to see if any of the edges of the problem surfaces are not smaller than the tolerance.

Steve


All times are GMT -4. The time now is 15:09.