Search found 3443 matches

by raback
12 Aug 2019, 11:19
Forum: General
Topic: Issue with currents computed by bSolver and MagnetoDynamics2DHarmonic
Replies: 3
Views: 37

Re: Issue with currents computed by bSolver and MagnetoDynamics2DHarmonic

Hi, Its difficult to comment without the whole case. However, it is clear that if you you have a jump in currents over elements this cannot be presented by continuous function. This is difficult to ovecome without a discontinuous visualization space. -Peter
by raback
11 Aug 2019, 18:41
Forum: General
Topic: Issue with currents computed by bSolver and MagnetoDynamics2DHarmonic
Replies: 3
Views: 37

Re: Issue with currents computed by bSolver and MagnetoDynamics2DHarmonic

Hi

The problem is that whereas Az is continuous sigma*Az is not. So what you are seeing is the effort to map discontinuous field to continuous basis functions. The remedy is to use discontinuous Galerkin (DG) basis as may be done with MagnetoDynamicsCalcFields (instead of BSolver).

-Peter
by raback
11 Aug 2019, 18:04
Forum: General
Topic: Trouble with mesh of over 1 billion elements
Replies: 3
Views: 35

Re: Trouble with mesh of over 1 billion elements

Hi Joe, How do you create your mesh. I hope internally with "Mesh Levels"? Then the preprocessing with ElmerGrid should not lead to any problems. There are a number of linear solver libraries and I don't know which of them would work out-of-box. Probably it would be easiest to start with the interna...
by raback
11 Aug 2019, 17:58
Forum: ElmerGUI
Topic: Eletromagnetic Waves Simulation
Replies: 2
Views: 157

Re: Eletromagnetic Waves Simulation

Hi Using Elmer just to solve Fresnel equations is not feasible since they are not PDEs. However, you could solve electromagnetic wave equations between different materials to analyze complex reflection/transmission boundaries. The refractive index, n, is associated to the relative permittivity, eps_...
by raback
11 Aug 2019, 17:46
Forum: ElmerGUI
Topic: 1D model in GUI
Replies: 2
Views: 126

Re: 1D model in GUI

Hi

ElmerGUI does not support 1D, ElmerSolver does. This will likely not change since 1D is such a rare exception.

-Peter
by raback
11 Aug 2019, 17:44
Forum: ElmerSolver
Topic: Contact Mechanics - Friction Test
Replies: 63
Views: 716

Re: Contact Mechanics - Friction Test

Hi, This seems like a very relevant thread which I've missed during my vacation and travels. I could have a look but it is somewhat difficult to read through the messages and see how far you came. Perhaps somebody could describe the current status (with case provided) and/or contact me with personal...
by raback
11 Aug 2019, 17:29
Forum: ElmerSolver
Topic: Induction heating of a steel rebar whitin mortar/concrete
Replies: 7
Views: 333

Re: Induction heating of a steel rebar whitin mortar/concrete

Hi The thing with BSolver is that it tries to compute the discontinuous Joule heating to continuous basis. You can also use MagnetocDynamicsCalcFields which can give the Joule losses also as DG fields. As the continuity is not enforced it maintains the positivity. I think you should not divided the ...
by raback
11 Aug 2019, 02:01
Forum: ElmerSolver
Topic: XFEM Method for crack propagation
Replies: 1
Views: 73

Re: XFEM Method for crack propagation

Hi James,

Unfortunately there are currently no plans to implement this. Not at least by the Elmer team. Would there be some researcher interested in the implementation we are however open for discussions on how this could be done. Elmer project is open for contributions.

-Peter
by raback
11 Aug 2019, 01:58
Forum: ElmerSolver
Topic: Quasi-Static Electromagnetic Field Problems
Replies: 2
Views: 98

Re: Quasi-Static Electromagnetic Field Problems

Yes, in 3D we use the AV formulation and the related solver is called "WhitneyAVSolver". -Peter
by raback
11 Aug 2019, 01:54
Forum: ElmerSolver
Topic: Charge relaxation problem
Replies: 7
Views: 827

Re: Charge relaxation problem

Hi Jeremie, Have you checked the timescale. With timestep approaching zero you should approach the initial guess. Relaxation may be very fast compared to the scales we are used to. So try not just with dt=~1s, but reduce the timestep until you see some transient behavior. If you have same results wi...