Elmer FEM software

#OpenSource #FiniteElement multiphysical simulation #software mainly developed by @CSCfi. Models for fluids, structures, electromagnetics, acoustics and beyond.

[Elmer FEM software @elmerfem]

@philipturnerar Using p-elements in Elmer does not require using 2nd order elements in Gmsh. It is a hierarchical construct upon the linear mesh.

[Elmer FEM software @elmerfem]

@philipturnerar It probably takes ~1 minute the write the mesh. The ".sif" file should be always rather small (and not depend on the mesh file).

[Elmer FEM software @elmerfem]

@philipturnerar You could add "Element = p:2" to the *.sif file. Actually, maybe you could share the case files and we could suggest improvements. Anybody working with the FreeCAD UI here?

[Elmer FEM software @elmerfem]

@cosmopotamian Elmer is continuously developed. The current devel compiles and passes all tests with CI on 12 different combinations of platforms/compilers. Maybe the build recipes there could help you. Some libraries may be more difficult to compile with but you can often leave out some.

[Elmer FEM software @elmerfem]

The circuit simulation community has recently shown increasing interest towards Elmer. We participated last week FSiC2024 in Paris which was about fostering FOS software in this field . See the presentation day 3 on Elmer here: https://t.co/vrpFekMLT0

[Elmer FEM software @elmerfem]

@QVHenkel Note that if you want to get good performance the use of p-elements is recommended. See presentation of J. Kataja, slides 9 and 14 in https://t.co/vrpFekMLT0.

[Elmer FEM software @elmerfem]

@DanSGiesbrecht @QVHenkel Nice example! Have you considered using p-elements? Using higher order elements often gives the desired accuracy with less cost that simply increasing mesh density. If you have problems in convergence of linear system there are tons of linear solver strategies to try out.

[Jamk @JAMK_fi]

Welcome to the XV Finnish Mechanics Days on October 2024!

The XV Finnish Mechanics Days is a forum for academic and industrial research in theoretical, computational, and experimental mechanics.

👉 Read more and registrate at https://t.co/OBZ8yqtxnQ

#FMD2024

[Daniel Giesbrecht, P.Eng. @DanSGiesbrecht]

Yesterday, I ran a FEM coupled simulation with @elmerfem to learn how to couple joule heating to heat transfer through materials.

Shown is a 1x8mm 1oz trace on FR-4 carrying 2.5A. It heats up by 17°C. It also heats the surrounding substrate.

#simulation

[Lukas Henkel @QVHenkel]

I used @elmerfem to visualize the mechanical stress in a PCB that is mounted on an aluminum heat sink. The material stress is caused by the different thermal expansion coefficients. This is why we should not place ceramic capacitors close to mounting holes 😬

[Lukas Henkel @QVHenkel]

I´m experimenting with using ultrasonic surface waves on the trackpad of the laptop project to enable multi-touch haptic feedback. This should make it possible to generate haptic feedback under individual fingers for multi-touch gestures. @elmerfem is a really helpful tool to model the interface between the piezo elements and the coverglass as well as the wave propagation. Best of all it is open-source 😁

[Elmer FEM software @elmerfem]

Nice tutorial! Happy to have Elmer included in your workflow!

[Lukas Henkel @QVHenkel]

I´ve created a tutorial video on how I use free and open-source simulation tools for the laptop project.

Take a look if you are interested in this topic 😊
Link in the comments

[Elmer FEM software @elmerfem]

@HD_mount_Music The discontinuous field is mushy because you try to project it to continuous field. There are options in Elmer to also use discontinous Galerkin (and reduced version of it) or elemental fields for postprocessing.

[Elmer FEM software @elmerfem]

@HD_mount_Music This test case needs code from last week. If you do not need the AMR then there are consistency tests CurvedBoundaryCyl* to study p and h strategy.

[Elmer FEM software @elmerfem]

Honored to be on the podium! ElmerFEM is #3 of 31,596 Fortran projects on GitHub.

[Lukas Henkel @QVHenkel]

I want to test different antenna locations in my laptop design for best directionality and gain. I´m currently testing the EM solver integrated into @elmerfem to see if I can extract the necessary information.

[Elmer FEM software @elmerfem]

@DanSGiesbrecht If you can save $PhysicalNames in Gmsh these can be used in ElmerSolver command file when you set "Use Mesh Names = True". Then Boundary Condition's and Bodies may be defined by the name directly without need to give some arbitrary numbers.