Polymesh cells file missing
 

Hi everybody I'm a new OF user, I have a problem and I hope someone can help me.
I have to import the results of my OF analysis in Calculix, but the operation fails because in the Polymesh directory the file 'cells' is missing.
I've created the mesh in NetGen, converted with netgenNeutralToFoam but the 'cells' files isn't created. The OF simulation works fine. I've read the manual, I know how a cell is defined, but I can't build this file.
Is there a way to create the 'cell' file?

Thank you very much

Fabrizio

The proper solution is to fix
 

The proper solution is to fix Calculix to read the owner/neighbour files. The cells file is a remnant from a much older OpenFOAM format.

Hi Mark thank for your advice.
 

Hi Mark thank for your advice. Can you tell me the structure of cells file?I need to create this file because fixing Calculix to read owner and neighbour is quite difficult, and I'm not a master in modifying Calulix source.

Thank you

Fabrizio

Sorry, I don't know it off-han
 

Sorry, I don't know it off-hand, but since it's a cellList (I think ... check the polyMesh source) it shouldn't be hard to create.

Had this lying around http
 

Had this lying around

http://www.cfd-online.com/OpenFOAM_D...hment_icon.gif writeCellsFile.tgz

Hi Mattijs thank you very
 

Hi Mattijs

thank you very much

I hope this works, it would be very important for me!

Tonight I'll try to run this file, and I'll let you know what I obtain.

Thank you again

Fabrizio

Hi Mattijs I don't know ho
 

Hi Mattijs

I don't know how to use this file, I'm not a master in C programming...

I try with the command

gcc writeCellsFile.C

but I obtain a lot of errors concerning missing libraries, that should be installed if OpenFoam works correctly.

Thanks for help

Fabrizio

Try the 'wmake' and 'wclean' c
 

Try the 'wmake' and 'wclean' commands. These are OpenFOAM-specific.

Perfect it works! Thank you
 

Perfect it works!

Thank you very much!

Nox I'm able to create the cell file, but I have another problem: when I type

cgx -foam <root> <case>

I obtain this error:

element type tet4 not supported

Now I'll try to change the element type of my mesh, do you know what is the right tipe?

Thank you again

Fabrizio

You'll have to check on the ca
 

You'll have to check on the calculix mailing list/forum.

Hi I think the problem should
 

Hi I think the problem should be solved also in OpenFoam. When I type

cgx -foam <root> <case>

I obtain this error:

elem-type:tet4 not installed.

I think this is due to the fact that OpenFoam names tethraedral element as "tet4", while Calculix names it as "C3D4", recognized as "type3" elements.

Is it possible to assign a different name to an element type in OpenFoam?

If possible, what should I modify?

Thanks to all again

Fabrizio

If calculix wants to call it s
 

If calculix wants to call it something else, that is their business. I wouldn't start changing OpenFOAM - there is lots that might break.

If you are writing ASCII format, then simply sed s/tet4/C3d4/g on the file.

Thank you for your reply. W
 

Thank you for your reply.

What file (files) should I modify?

Your 'cells' file of course!
 

Your 'cells' file of course!

There is no information about
 

There is no information about element type in cells file...
It only is a list of cells in this way:

4(a b c d)

4 stands for the number of nodes necessary to build the element, and a b c d are the points labels.

That's why I thought I should modify some in OpenFoam...but I don't know what!

Thanks

Fabrizio

Before you can change the outp
 

Before you can change the output, you really need to know what calculix is expecting to read. Is there not a calculix mailing list or forum where you can find some help?