[jdkummer]

We are currently using FEMAP and NASTRAN to do FEA analysis (using NeiNastran). I was wondering if anyone knew if it was possible to generate a mesh using FEMAP and import it into Openfoam for CFD analysis? I see that FEMAP can output a FEMAP neutral file, as well as the NASTRAN file. Thanks

Joe

[mattijs]

Not aware of any converters that handle those formats. If they are text formats you might be able to code them yourself starting from one of the existing converters (in $FOAM_UTILITIES/mesh/conversion)

[jdkummer]

I checked the documentation, and found that FEMAP can output several other formats, including Ansys, I-DEAS .unv format, and PATRAN. I tried using the Ansys format, and then reading into OpenFOAM and it worked, but I was unable to retain the boundaries. The only way I was able to bring back the boundary patches was to use Autopatch. This worked for a small test problem, but I'm not sure if it's a good solution for more complicated meshes with many walls and inlets/outlets etc. As for the .unv format, I noticed that the list of updates for Version 1.4 includes support for this type of file. I'm wondering if .unv will be able to retain any of the boundary information, or if Autopatch is always necessary from any of these formats?

Thanks

Joe

[mattijs]

Problem with Ideas-unv is that I don't know how the patch information is stored.

ideasToFoam: "Uses face groups (2467) to do patching. Works without but then puts all faces in defaultFaces patch"

Can you make a tiny test file with boundary information so I can try it? (unfortunately the converter won't compile under 1.3)

[jdkummer]

I have a .unv file of a block with 8 elements and boundary definitions for an "inlet" and "outlet". How do I upload the file to this discussion site (or I can email it directly to you)? The file seems pretty simple: 2411 for nodes, 2412 for elements, and 757 for boundaries. In this case, I defined the boundaries by setting them as individual "constraints" in FEMAP.

Joe

[mattijs]

You can send it to me directly (m.janssens-at-opencfd.co.uk) or use \attach (see Documentation->Formatting)

[wolle1982]

Thank you for the help.

It worked: in FEMAP (Nastran) you have to define the needed patches as a "constraint". The DOF (degrees of freedom) should be switched on.

Via the "ideasUnvToFoam" import it works just fine.

[Caltech Brian]

Hi,

I saw that you were a Femap user. So am I. I use Femap with NX Nastran (stress + dynamics + heat transfer). I was hoping to use Femap at least as a post-processor. It looks like you are using it as a pre-processor.

Any luck using it as a post-processor?

I have experience generating data/meshes using Matlab. I usually generate bulk data decks and read this into Femap. That was the direction I was headed. Do you recommend this ANSYS interface?

Brian

[steel]

can any one pls help me model this satellite in Femap?? im new to this program and i need help modeling this particular satellite, can any one help me please? i would greatly appreciate it!!!
[IMG]file:///C:/Users/DANANA%7E1/AppData/Local/Temp/moz-screenshot-2.png[/IMG][IMG]file:///C:/Users/DANANA%7E1/AppData/Local/Temp/moz-screenshot-3.png[/IMG][IMG]file:///C:/Users/DANANA%7E1/AppData/Local/Temp/moz-screenshot-4.png[/IMG]
http://www.scribd.com/doc/13083827/tmgfprim

you can see a picture of it above!! i dont need the antenna just the 2 wings and the body!! pls

[IMG]file:///C:/Users/DANANA%7E1/AppData/Local/Temp/moz-screenshot.png[/IMG][IMG]file:///C:/Users/DANANA%7E1/AppData/Local/Temp/moz-screenshot-1.png[/IMG]

[mxpxer7]

wolle,
I'm attempting to export a FEMAP mesh with Inlet,Outlet and Wall patches. I'm defining each of these in FEMAP using individual constraints.

The inlet and outlet patches come in no problems. However, the wall patch keeps giving me an error saying that elements are overlapping..

So i tried exporting a patch were two surfaces connect, every time I define surfaces bordering each other as a patch i got this error, any thoughts?

[thomasnwalshiii]

Hi,

I am a Femap/Nastran user and have used OpenFOAM to do some simulations when my Nastran licence doesn't permit me to do them (only have the basic license ). If you upload your file I can have a look and see if I can help you out.

Tom