OpenFOAM with OpenVSP

[Rob McDonald]

Ricardo,

If you could document some of your experiences and best practices for
VSP to OpenFOAM on the VSP Wiki, that would be a great help.

Also, if there are any weak spots in the process that you can
identify, there may be something that I/we could do to address them.

STL is the 'lingua franca' of 3D file formats, but it has lots of
weaknesses. We may be able to do better. I found the following link
that describes some of the options.

http://www.openfoam.com/features/mesh-conversion.php

VSP writes out TetGen files, so you may be able to try that.
Otherwise, it probably is not too difficult to write out foam files --
or to write a converter like these.

These links summarize the information and file formats VSP can work with...

http://www.openvsp.org/wiki/doku.php?id=representations
http://www.openvsp.org/wiki/doku.php?id=files

Rob


On Tue, Mar 5, 2013 at 11:32 PM, Ricardo Díaz <rdg...@gmail.com> wrote:
> Hi Dome,
>
> I've been using OpenVSP with OpenFOAM for some time now. The models exported
> from OpenVSP as stl file work perfect with the snappyHexMesh meshing tool of
> OpenFOAM.
>
> You should only take into account to try to have a smooth surface so the
> layer addition process of the mesher converges good.
>
> Ricardo Díaz.
>
>
> 2013/3/6 Rob McDonald <rob.a.m...@gmail.com>
>>
>> Dome,
>>
>> Welcome to OpenVSP.
>>
>> We have various users who are driving various CFD tools with OpenVSP.
>> Done right, I believe this can be done well. I have a lot of
>> experience with the Cart3D Euler code, but it is a bit different from
>> 'normal' CFD codes.
>>
>> This summer, I will have a student starting to work the connections to
>> other CFD codes. I hope to expand the general capability and my
>> confidence in this area. Most of this will target NASA codes and
>> perhaps commercial codes.
>>
>> I don't have any direct experience with OpenFOAM, but I am happy to
>> support your efforts. A while back, I posed an OpenVSP announcement
>> to the OpenFOAM mailing list -- I don't know if anything came of it,
>> but I think there are very natural connections that could be
>> established.
>>
>> Rob
>>
>> On Sun, Mar 3, 2013 at 8:39 PM, <dome...@gmail.com> wrote:
>> > Rob,
>> >
>> > I am a aero engineering stuent and i have just found these two great
>> > open
>> > source software. i would like to be able to use openvsp as a CAD and
>> > openfoam as a cfd analysis tool. has any one have had good experience
>> > with
>> > this ? . Are the models generated using openvsp of good enough quality
>> > for
>> > carrying out cfd analysis and get meaningful results ?.
>> >
>> > Thanks for your time and help.
>> > Dome
>> >

[Shreyas Vathul Subramanian]

Did a documentation come out on this front? It would really be great to link OpenVSP and OpenFOAM!

Shreyas

[Rob McDonald]

None that I know of.

If you make any progress in that direction, I make the same request to
please contribute back some documentation.

Rob

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[Shreyas Vathul Subramanian]

I will have to connect OpenVSP with either openFOAM or OpenLB within the next 6 months. I will definitely contribute back if there is progress.

Shreyas

[Ricardo Díaz]

Hi everyone,

I have worked with both OpenVSP and OpenFOAM. There isn't really much to talk about it.

The "automatic" meshing tool from OpenFOAM, snappyHexMesh, takes geometry in stl format to do the meshing. Because of how the software works, the quality of the original mesh in the stl faile it's not relevant, as long as it is watertight and resembles correctly the geometry you want to study. You can even pass it different stls or a stl with different solids and it would calculate the intersections automatically.

You can see more information on the OpenFOAM Documentation http://www.openfoam.org/docs/user/snappyHexMesh.php

Ricardo Díaz.

2013/7/4 Shreyas Vathul Subramanian <shreya...@gmail.com>