Computational Fluid Dynamics (CFD) workbench using OpenFOAM

[thschrader]

here some code to add all faces of a shape as reference shapes to an FEM object: https://forum.freecadweb.org/viewtopic. ... 10#p211310

Hi Bernd,
thanks for the info. I have seen the passage in the macros from Oliver how to adress the boundaries
to the faces (Falcon = 225 faces). In the cfd boundary dialog theres is an option
"select from list/select all". This could be usefull for FEM too. I tried the same process
with the topography-model below (5669 faces!). After 30 min loading I terminated FC

EDIT: where are the other pics???

The attachment FalconBoundaries.JPG is no longer available

The attachment SelectFromList.JPG is no longer available

FalconBoundaries.JPG (39.81 KiB) Viewed 2013 times

[bernd]

I have seen the passage in the macros from Oliver how to adress the boundaries
to the faces (Falcon = 225 faces). In the cfd boundary dialog theres is an option
"select from list/select all". This could be usefull for FEM too. I tried the same process
with the topography-model below (5669 faces!). After 30 min loading I terminated FC

Where can I download the shape? I could try to add all faces of the shape by Python on an FEM constraint, just to see if it is a general FreeCAD problem. But it should work AFAIK.

... This could be usefull for FEM too.

For sure. As well as https://forum.freecadweb.org/viewtopic.php?f=22&t=23307 It is just a matter of time. If you don't mind you could create a Feature Request on mantis in this regard add the links to the forum topics and assign it to me.

Bernd

[thschrader]

Where can I download the shape? ...If you don't mind you could create a Feature Request on mantis in this regard add the links to the forum topics and assign it to me.

Complete geodata-file on my dropbox (12MB). See also
https://forum.freecadweb.org/viewtopic. ... 4&start=20
https://www.dropbox.com/s/d4i24cqjihatz ... FCStd?dl=0
Feature request: I dont know how to do that...

[thschrader]

BTW:
You can use the geodata-wb for importing LIDAR topography as described here:
(for instance: flood simulation)
https://www.youtube.com/watch?v=ivrpvEqTq48
Free testdata (use dgm1):
https://www.lvermgeo.sachsen-anhalt.de/ ... n/main.htm

LIDAR_XYZ-PointCloud.JPG (216.35 KiB) Viewed 1989 times

[Kunda1]

BTW:
You can use the geodata-wb for importing LIDAR topography as described here:
(for instance: flood simulation)
https://www.youtube.com/watch?v=ivrpvEqTq48
Free testdata (use dgm1):
https://www.lvermgeo.sachsen-anhalt.de/ ... n/main.htm
LIDAR_XYZ-PointCloud.JPG

ping

[bernd]

Where can I download the shape? ...If you don't mind you could create a Feature Request on mantis in this regard add the links to the forum topics and assign it to me.

Complete geodata-file on my dropbox (12MB). See also
https://www.dropbox.com/s/d4i24cqjihatz ... FCStd?dl=0

do you see the light red on the shape ...

pic1.jpg (550.55 KiB) Viewed 1977 times

the arrows

oic2.JPG (637.09 KiB) Viewed 1977 times

the code:

Code: Select all

# load your geodataTest.FCStd file
obj = App.ActiveDocument.child001
refele = []
for i, face in enumerate(obj.Shape.Faces):
    if face.Area * 1e-6 < 100:
        # print(face.Area * 1e-6)
        refele.append("Face%d" % (i+1))

#

tmp = (obj, tuple(refele))
print(tmp)


import ObjectsFem
cf = ObjectsFem.makeConstraintFixed(App.ActiveDocument)
cf.References = tmp 
App.ActiveDocument.recompute()

takes aound a minute or two to finish. FreeCAD is not that fast with all these arrows but it does not crash and it is moveable. But I would turn the constraint of move, zoom, rotate and turn them on if I where you

[bernd]

Feature request: I dont know how to do that...

in the forum do you see the little bug (Käfer) beside the search box? Click on it an you will be on FreeCADs bug tracker. There you could make a new issue in FEM.

[Kunda1]

Feature request: I dont know how to do that...

in the forum do you see the little bug (Käfer) beside the search box? Click on it an you will be on FreeCADs bug tracker. There you could make a new issue in FEM.

Look at my signature

[thschrader]

takes aound a minute or two to finish. FreeCAD is not that fast with all these arrows but it does not crash and it is moveable. But I would turn the constraint of move, zoom, rotate and turn them on if I where you

Yes, macro works. The time to adress the faces as fixed boundaries was 7 min, thats ok for 5600 faces.
For me the problem is my graphics-system. When turning off the visibility of the constraints,
everything is fine. After setting visibility=true, the GUI needed 20 min to show the arrows.

topo2.JPG (323.03 KiB) Viewed 1956 times

[bernd]

Ok I'm not goint to try on my FreeCAD development laptop. Happily I did your example on my work machine which is a quite good one. The modell it is still usable with arrows but slooooow. Thus I deactivated them immediately. The whole arrow system of the constraints could surely be optimized ... We should be happy it is so easy to switch visibility.

I would just be speed up things a lot if we would only display one arrow per face, but this can not be adjusted ATM.