Elmer Discussion Forum

I suggest using the Gmsh GUI as it provides a lot of options. I use the Python API of Gmsh frequently. You can do pretty much anything with it. I believe FreeCAD's Gmsh integration is limited and not fully up to date.

Thank you very much for doing that. It makes sense. I was using gmsh fragment option that does the same thing. However, there were some issues with that. I noticed that you have Mortar BC = 3 in the boundary condition. but I did not see any boundaries named 3. did you use mortar boundary in this cas...

Hi Kevin,

Yes, you are right. the to surface is the contact. that I am applying voltage to. I will fix that.

I am adding the step file here.

In fact I tried all sort of options to merge the meshes but no sucess. It seems my mesh is not merging at all. Looking at the mesh in paraview after issuing the -merge command, shows that they are not merged. Any idea?

There is not any coincident nodes. They can't be merged. Here is my attempt at making the mortar BC work. but the result is still the same I have attached the project in the zip file. https://drive.google.com/file/d/1k5YdA5iHZgbJXBZFpcnmH5_mdd2eR2Q0/view?usp=sharing Header CHECK KEYWORDS "Warn&...

Thank you Kevin, I have one more question. In this case the pad and the copper have the same nodes (conformal meshing). what if the pad and the pcb are different volumes that are touching each other but don't have conformal meshing? like the picture attached. It seems that there is no contact betwee...

Hi, I am doing a static current conduction in Elmer. I have a pcb file that has a pad on top. I apply a 5 V to the pad and 1 A to another pad and the same net. However, it seems that there is no contact between the pad and the surface. as shown in the image below. I am looking at potential and it se...

Hey,

can you post your files so I can try to run it? Also, can you post a screenshot of what you think is wrong

I just ran your model with Kevin's suggestion. I ran just fine for me as well. However, I noticed it took a bit longer that I expected for a dc-conduction simulation. I wonder if you mesh the pcb using hexahedral, the simulation will converge faster. The reason, I am asking is that, when you run the...

In Gmsh this can be generated using transfinite method. it would be easy in this simple geometry you have. However, since you want to do pcb simulation, transfinite would be hard. You mean want to look into sweep function for doing pcb simulation. this might give you a good quality mesh. I suggest m...