Elmer Discussion Forum

Well, that got me a step closer, but the partitioning is only working well in one direction. I can't seem to work out the -connect flag. It just doesn work. My execution code is: export N_PROC=2 export MY_DIR="" ElmerGrid 2 2 "$MY_DIR" -metis $N_PROC -periodic 1 1 0 -partoptim -o...

Hello, I found out that the issue is with the partitioning. If I don't partition my model the simulation works using the following boundary conditions: Boundary Condition 1 Target Boundaries(1) = 11 Name = "Fixed" Temperature = 293 Displacement 3 = 0 End Boundary Condition 2 Target Boundar...

Hello, I'm getting stuck applying the correct boundary conditions. The following BCs are not giving me the correct results. The left and right yz planes need to stay perpendicular to the xy plane. The simulation result shows a variation of x displacement in the yz plane but it can only be constant. ...

Hello, I would like to perform a thermo-mechanical simulation. The design is like a cube. The cube is part of a much larger plate. The cube is repeated in x and y direction. The plate can expand in x, y and z, but it cannot buckle. A thermal gradient is applied from top to bottom. For the x-axis sym...

Hello, To understand fracture mechanics, a j-integral can be used which would eliminate the need to make a very fine mesh near a crack initiation site. Does anyone have any experience in implementing the J-integral in Elmer? If you have any advice. It is much appreciated if you could tell us how you...

If I set the boundary condition for all nodes, how do I unset it for a specific node?

Hello, This might be a stupid question, but in the .sif file, can I select all boundaries but one or two? I need to set 34 boundaries to a certain temperature, but only 2 not That would look like Target Boundaries(34) = 1 2 3 4 7 8 9 10 11 12 13 14 15 16 17 18 ........ any other way of doing this th...

Hello, I would like to know how to do a residual stress simulation in Elmer. This is very interesting for MEMS structures. What happens is that a layer that is deposited on a structure at high temperature and has a different coefficient of expansion, will cause a stress on the structure it is deposi...

It would be more helpful if you could post the whole .sif file here. Did the simulation produce a .ep file in your project directory? If so, you can view this with the postprocessor and get an idea of the deformation you have applied. If that is correct you can investigate how to import a previous r...

Hello, I have an object on which a rotational force is applied. The object is suspended by two tethers on each side. The tethers should be attached to some sort of spring, which I want to simulate as a spring boundary condition. I am not able to apply the spring boundary conditions correctly, I've t...