Hi Johannes,
I can't reproduce the crashes when deleting the curves... Your file also seems
very complicated. I would just do:
SetFactory("OpenCASCADE");
Geometry.OCCTargetUnit = "M";
v() = ShapeFromFile("wing_fuselage.step");
Box(3) = {-5, -5, -5, 10, 10, 10};
out() = BooleanDifference{ Volume{3}; Delete; }{ Volume{v()}; Delete; };
out() will contain the volume of interest.
Christophe
> On 27 Mar 2019, at 19:29, Johannes Dillinger <[email protected]> wrote:
>
> Dear all,
>
> I'm looking for a suitable way to "quickly" generate Euler meshes for SU2 CFD
> analysis.
> So the usual setup is a (hopefully rather simple) STEP model of a
> wing-fusleage part for example, that I want to mesh in GMSH.
>
> I attached a sample STEP and the geo-file that I have been working on, but I
> cant seem to find the errors..
> • First I merge the STEP-file and reverse some surfaces (that
> apparently are oriented in the wrong direction)..
> • I generate a surface loop of the outer surfaces for defining outer
> volume later on. Here the first weird thing happens: the loop command
> generates surfaces 17, 18, and curves 39-44
> • I delete surfaces 17 and 18, since they later on will make problems
> otherwise
> • I also delete the imported volumes
>
> I then generate a farfield/bounding box, and also here, the loop command
> generates additional surfaces 1007 to 1010, and I cant figure out why..
> Anyway, I again delte those, since they will cause problems otherwise.
>
> The last problem which really stops me from continuing is the outer volume
> that I generate with the "Volume" command in line 50. This one again
> generates a surface 1009, that I cant delete anymore..
> So the surface will be 2D meshed and maybe then leads to the problem that the
> outer volume cannot be meshed.
>
> I guess thats enough questions and porblems for now. Once solved, it would be
> great if you could help me with mesh density and so on (already in the geo
> though), but thats for later..:-)
>
> So, to sum up:
> • is the general methodology I use ok?
> • how can I avoid the additional surfaces and curves to be created?
> • which problem still exists that does not allow for the 3D mesh
> generation?
> Thank you so much in advance!
> Best regards,
>
> Johannes
>
>
>
>
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—
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
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