Hi,

does anyone has the description (or the link to) of an unstructured grid file format, which can be imported by cfx 5.7.1 or greater? E.G. Patran (where I don't understand the boundary definition within the named components). Favoured is ascii, but binary is also welcome (in particular it is sufficient documented). If possible, I don't want to use it via a library (e.g. as cgns).

In my opinion, the file only has to have the following sections

Thanks in advance!

Oliver

nodes 1 x1 y1 z1 2 x2 y2 z2 ... elements/cells (here hexaedrons) 1 1 2 3 4 17 16 15 14 1 21 22 23 24 99 100 101 102 ...

boundary1 (here quads) 1 1 2 3 4 2 5 6 7 8

boundary2 ...

How about NASTRAN? Looks a lot like what you described. Here's a small example with 7 hexa's.

/C

-----------------------------------

$ Nastran input deck

SOL 103

CEND

BEGIN BULK

GRID 1 059.00000-8.0000015.00000 0 0

GRID 2 0-6.00000-8.0000015.00000 0 0

GRID 3 059.000004.00000015.00000 0 0

...and so on down to:

GRID 16 055.40000.4000001-11.4000 0 0

$ Volume element data for family SOLID

PSOLID 1 0 0 0

CHEXA 1 1 1 2 4 3 5 6 8 7

CHEXA 2 1 9 10 12 11 13 14 16 15

CHEXA 3 1 11 12 3 4 15 16 7 8

CHEXA 4 1 10 9 2 1 14 13 6 5

CHEXA 5 1 12 10 1 3 16 14 5 7

CHEXA 6 1 9 11 4 2 13 15 8 6

CHEXA 7 1 13 14 16 15 6 5 7 8

ENDDATA

Hi Chebeba,

thanks for your answer! Yes, this works (after I reformatted your example). But how can I define several boundary faces? Or several cell zones? I changed some parameters from 0 to 1 or to 2, but nothing happens within CFX.

Do you have a documentation about the different parameters?

Regards

Oliver

As usual, Google is your friend:

http://www.mscsoftware.com/support/p...elease2001.pdf

(Lots of stuff about the solver, I didn't read it all but looks like you should find what you want somewhere in there... /C

Hi Chebeba,

thanks again. For Nastran, it seems that cfx ignore the boundaries. But I've got now the necessary information on the patran neutral file format.

Regards

Oliver