Linear thermal bridging

About the development of the FEM module/workbench.

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poulmack
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Joined: Tue Nov 07, 2017 7:17 pm

Linear thermal bridging

Post by poulmack »

Hello,
I would like to use the FEM workbench of FreeCAD to calculate linear thermal bridging in 3D assemblies. Does anyone know a way to reproduce results like https://buildingphysics.com/heat3-3?
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NewJoker
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Re: Linear thermal bridging

Post by NewJoker »

FreeCAD supports both CalculiX and Elmer for thermal analyses. You can find quite a lot of interesting examples on the forum. Check the documentation too:
https://wiki.freecad.org/FEM_Workbench# ... _and_loads
https://wiki.freecad.org/FEM_EquationHeat

Some features may not be supported but they can often be added manually to solver input files if a given solver supports them.
poulmack
Posts: 12
Joined: Tue Nov 07, 2017 7:17 pm

Re: Linear thermal bridging

Post by poulmack »

Thanks for the info @NewJoker,

There is some extra information about the requirements here.
https://www.greenbuildingforum.co.uk/ne ... 107&page=2

It looks like there is a good amount of work and I am not proficient with coding, etc. Do you know if there is a way to support this and to kinda know the expected output?
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NewJoker
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Re: Linear thermal bridging

Post by NewJoker »

You need to figure out exactly what you need for this simulation - what kind of boundary conditions, material properties, outputs and so on. Then I can tell you if it’s possible in FreeCAD FEM and how to do it. When it comes to heat transfer simulations, this workbench has quite a lot of capabilities so probably most stuff that you need is already there and the rest can be added manually to solver input files if it’s supported by CalculiX or Elmer. Just keep in mind that those are general purpose FEM solvers so they don’t have any features specific to civil engineering applications of thermal analyses (unlike the software that you’ve referenced) but should be able to handle them with more or less effort from your side. I wouldn’t expect having to code anything for this though.
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