Search found 28 matches

by edge025
07 Dec 2021, 21:56
Forum: ElmerSolver
Topic: Simulation of the force between two magnets
Replies: 31
Views: 16080

Re: Simulation of the force between two magnets

Peter, I ran your case that was posted on 30 Jan 2020. It works, just like you stated. However, for 3D my meshing workflow usually involves tets, not hex like in your mesh. When I ran the model using tets and gradient adaptive mesh refinement my "zeros" for magnetic force are on the order ...
by edge025
03 Feb 2020, 19:39
Forum: ElmerSolver
Topic: Calculate 3D stress tensor for static equilibrium
Replies: 6
Views: 3654

Re: Calculate 3D stress tensor for static equilibrium

Ok, after doing more research on this, it looks like using just those equations would make the structure statically indeterminate. Material properties are needed. Thank you for your response, Mika, as it serves to confirm.

Joe
by edge025
03 Feb 2020, 18:35
Forum: ElmerSolver
Topic: Calculate 3D stress tensor for static equilibrium
Replies: 6
Views: 3654

Re: Calculate 3D stress tensor for static equilibrium

Mika,

Do you have a recommendation on how I can solve this problem? Is it formulated correctly? My background is electrical, not mechanical.

Joe
by edge025
03 Feb 2020, 17:18
Forum: ElmerSolver
Topic: Calculate 3D stress tensor for static equilibrium
Replies: 6
Views: 3654

Re: Calculate 3D stress tensor for static equilibrium

Would the answer be to set the Young's Modulus to a very high value and put this in Solver: Time Derivative Active = Logical False ?

But doesn't Elmer calculate the stress from the strains? Am I saying or framing all this correctly?
by edge025
03 Feb 2020, 17:12
Forum: ElmerSolver
Topic: Calculate 3D stress tensor for static equilibrium
Replies: 6
Views: 3654

Re: Calculate 3D stress tensor for static equilibrium

Particularly I would like to solve these equations for the stress:
Equilibrium3DEqs.png
Equilibrium3DEqs.png (61.97 KiB) Viewed 3638 times
where bi is a body force. I would supply to Elmer BCs of force along particular boundaries (not all) and displacement would be zero everywhere.

Any help appreciated. Thank you.

Regards,
Joe
by edge025
03 Feb 2020, 04:26
Forum: ElmerSolver
Topic: Calculate 3D stress tensor for static equilibrium
Replies: 6
Views: 3654

Calculate 3D stress tensor for static equilibrium

Hi,

Is it possible with current solvers to calculate the 3D stress tensor for a rigid body in static equilibrium? Basically, displacement should be zero everywhere and I would specify a force on a particular boundary. The solver would calculate stress field everywhere using that info.

Regards,
Joe
by edge025
10 Dec 2019, 07:40
Forum: ElmerSolver
Topic: How to autosave result data files and start from the last time step if solution crashed
Replies: 9
Views: 4343

Re: How to autosave result data files and start from the last time step if solution crashed

I run Elmer from the command line (I don't use ElmerGUI), however, maybe this will work for you. In the sif file, add the following in the Simulation Section: Output Intervals = 1 Output File = "result.dat" Binary Output = True ! Restart File = "result.dat" ! Restart Position = 0...
by edge025
10 Dec 2019, 07:23
Forum: ElmerSolver
Topic: Parallel ReloadSolution Solver
Replies: 0
Views: 5641

Parallel ReloadSolution Solver

I really don't know right now how to use github or anything like that to do this: I noticed that the ReloadSolution Solver does not work in parallel. After fishing around a little, I was able to add like 2 lines and get it to work in parallel. I have attached the result. I did this a while ago, but ...
by edge025
10 Dec 2019, 07:10
Forum: ElmerSolver
Topic: Trouble with Mesh Interpolation
Replies: 9
Views: 4886

Re: Trouble with Mesh Interpolation

Peter, I want to thank you for the suggestion you gave me, it really spring-boarded me into solving this issue and coming up with a really nice solution (at least for me) that has worked very nicely and I think i will use very often. I also wanted to provide that solution for others, because i have ...
by edge025
06 Nov 2019, 21:40
Forum: ElmerSolver
Topic: Parallel DataToFieldSolver
Replies: 1
Views: 1532

Parallel DataToFieldSolver

Hello,

Before I spend a whole lot of time on this, maybe someone has an answer before I do:
Does "DataToFieldSolver" work in parallel? Meaning, Elmer is running in parallel, but the ASCII file is only one file (not partitioned).

Thanks.

Regards,
Joe