Thermal analysis

Addons CfdOF / CFD
1

[quote=oliveroxtoby post_id=214151 time=1518167737 user_id=11950]
As an introduction to the CfdOF workbench, we collect together a list of useful training material:
[list]

  • [*] [url]https://opensimsa.github.io/training.html[/url]
    Example test problems consisting of slides to walk you through the set-up process. The starting geometry is provided as well as the FreeCAD macros which reproduce the steps to set up the examples.
  • [*] [url]https://youtu.be/8A9GewANqh8[/url]
    A nice beginner's walk-through video created by @makkemal
    • [/list] [/quote] Hi Oliver,
    thank you for your work and useful links :D

    I was wondering if you have some tutorial on thermal analysis for pcbs...
    something like this
    https://www.simscale.com/projects/ahmedhussain18/pcb_-_transient_thermal_analysis_1/

    Some time ago I started a thread here
    https://forum.freecadweb.org/viewtopic.php?f=18&t=16749&start=40#p133612
    [img]https://forum.freecadweb.org/download/file.php?id=25541[/img]
    and published something here
    https://forum.kicad.info/t/kicad-stepup-and-fem-thermo-mechanical-analysis/3828

    but the video that @makkemal kindly published is not available anymore
    https://forum.freecadweb.org/viewtopic.php?f=3&t=17068&start=10#p135611
    (it was using old methods that have been supersede by the new FEM updates).

    I think it would be a large interest for PCB thermal analysis with FreeCAD and FEM ...

    Thanks a lot in advance
    Maurice
    2

    Hi Maurice,
    Your above linked simulation is done with calculix. So, this is maybe the way to go. One would have to create a boundary condition for convective heart flux and a body load for body heat flux inside freecad.
    The elmer solver should do it as well after implementing convection and this type of heartflux but you would have the benefit that you could solve the temperature separately from deformation, which is not possible in Fc -calculix now.
    BR,
    Howil

    3

    See also… https://www.simscale.com/docs/content/simulation/analysis_types/heatTransferDescription.html

    @Bernd: what do you think?

    4

    Sounds good to me. Would one of you give it a try?

    5

    I have the model and could simulate it if the body heart flux and the convection would be available.

    @bernd: Should we split this thread and create a new one?
    BR
    Howil
    EDIT: Here is some additional info for the ‘benchmark’ model : https://www.simscale.com/projects/ahmedhussain18/pcb_-_transient_thermal_analysis_1/
    And the geometry is attached in a first simple model.
    Termal analysis pcb ccx.fcstd (44.9 KB)

    6

    Hi @Howil and @bernd
    thank you a lot for your help…
    If you want we could create a new post like:
    ‘FEM Thermal Analysis of a PCB’

    If you need a different model, please let me know.
    Maurice