Elmer Discussion Forum

Hi, I came across a simulation built in simscale using calculix to compute a thermal analysis on a PCB: https://www.simscale.com/projects/ahmedhussain18/pcb_-_transient_thermal_analysis_1/ Convective heat loss is computed in this model without computing Navier-Stokes. Instead one has to specify on w...

Also consider to use the built in Calculix thermomechanical solver (displacement caused by the temp-change are also computed) for comparison. With Calculix in FreeCAD the results look like Screenshot from 2017-11-10 18-18-23.png And here the results computed using Elmer compined with FreeCAD: Screen...

And here is the outcome simulated with ElmerGUI and visualized in Paraview: Screenshot from 2017-11-10 18-01-50.png The FreeCAD file, the .unv mesh and the elemer project can be found here FreeCAD_ElmerGUI_demo.zip BR, Wil Created with: OS: Ubuntu 16.04.3 LTS Word size of OS: 64-bit Word size of Fre...

I used the unstable 0.17 version of FreeCAD for the shown example (daily ppa on ubuntu; or use the https://github.com/FreeCAD/FreeCAD/releases/tag/0.17_pre if you are on windows) If you want to construct and mesh you plate in FreeCAD and do the model set-up and simulation in ElmerGUI here is a short...

Unfortunately, the file is still in the native .fcstd format Hi Gary, You can use FreeCAD to define all groups in the mesh and simply export your (with-freecad-generated) GMSH mesh as .unv and import it into ElmerGui after transferring it with ElmerGrid. Alternatively, you can use the current devel...

Hy Peter,
Any changes on this topic?
BR,
HoWil

I had a quick look. Thanks you are completely right with all the parameters... could figure it out by myself but did not show the results here. Thought its better to keep it focused on the bubbles setting. I almost posted simultaneous the outcome here... http://www.elmerfem.org/forum/viewtopic.php?...

Let me post here some preliminary results produced with the work of Markus, since the GSoC is almost over. See also https://forum.freecadweb.org/viewtopic.php?f=18&t=22576 and https://github.com/drhooves/FreeCAD/tree/femnewsolver By using Elmer it is now also possible to simulate fluid flow comb...

raback wrote:ping

Hi Peter,
Setting bubbles and stabilize both to True leads to the segmentation fault above.
Could you implement a query and warn the user.
BR Wil

OK I found the problem for the Seg-fault:
I removed : But the model is still not convergent.
Thanks in advance,
Wil