Lt72884 wrote: ↑Mon Feb 05, 2024 3:40 am
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Thank you for the information. To understand correctly, when you say 10 minutes for computing, thats for the 2D case, not the 3D?
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Yes, 10 min is the runtime for the 2D-case.
Here is a 3D-case with 8 hour runtime. Give it a try...
Meshing needs only 1 min.
... so with a 2d case, i just need the top faces of my blade correct? I have not learned 2d in freecad yet so that will be new as well. Here is an example to get an idea how the setup works. NACA2412 profile, see Report 586 page 7 here: https://ntrs.nasa.gov/api/citations/19930091662/downloads/1993...
Interesting, so i have to create some sort of wind tunnel then. I have been following their approach from downloading the file, but its taking over 2 hours to run the solver in openfoam and for the residuals to finish. Is this normal? I have 12 core cpu and 32gb of ram thanks Yes,cfd is very comput...
There is no option in the cfdof-GUI to define a time dependent inlet patch.
But you can write/edit the case files. Then run solver.
Example (very old): viewtopic.php?t=29286&start=20
... Besser: FreeCAD Datei mit genauen Abmessungen. Sicher könnte ich das hier hochladen, du würdest es anschließend berechnen und ich würde es beim nächsten Mal wieder nicht verstehen. Nein, ich möchte wissen, was du tust , um es selbst zu machen. ... Ja, ich würde es wieder berechnen. Aber ich kan...
2 Möglichkeiten: Grafisch als Krafteck, die blaue Resultierende muß durch den schwarzen Strich an der Fundamentunterkante laufen (Kernfläche, Weite b/3), dann gibt es keine klaffende Fuge und das System ist stabil. Die Reihenfolge der geometrischen Addition der Kräfte ist egal, die Richtung der blau...
Addendum:
cfd-sim with cfdof-wb, blade exported as step, loaded in prepomax.
OpenFOAM p-field imported into prepomax, static calulation of the blade.
The imported p-field was scaled with 1,25 to account for air density.
Wind speed is 7 m/s (25 km/h).
Here is my attempt: I have reconstructed the wing with the "Curved-shapes" workbench, see addon-manager or https://github.com/chbergmann/CurvedShapesWorkbench The leading/trailing edges are now tangential to the wing surface. The inner wing part is a simple loft. With GMSH I can produce a ...