Search found 3366 matches

by raback
03 Feb 2019, 23:15
Forum: ElmerSolver
Topic: Flux in Axisymmetric
Replies: 1
Views: 47

Re: Flux in Axisymmetric

Yes, multiply by 2PI. The weak form of the PDE does not include the factor. -Peter
by raback
28 Jan 2019, 00:00
Forum: ElmerSolver
Topic: adding youngs modulus as a function of stress
Replies: 11
Views: 188

Re: adding youngs modulus as a function of stress

Hi

You should set "Calculate Stresses = True" and then you can make the Youngs Modulus depend on the results. Note that stresses are computed after the solver so you need to iterate on the coupled system level.

-Peter
by raback
25 Jan 2019, 12:44
Forum: ElmerSolver
Topic: von karman instability
Replies: 4
Views: 81

Re: von karman instability

Hi

Do you have same timestep size? The case is critical to the timestep. With longer steps the instability vanishes.

-Peter
by raback
23 Jan 2019, 16:27
Forum: ElmerSolver
Topic: Calculating hydrodynamic lifting
Replies: 2
Views: 83

Re: Calculating hydrodynamic lifting

Hi

In BC3 set Velocity 2 to zero.

-Peter
by raback
21 Jan 2019, 17:49
Forum: Contributed Cases
Topic: simple adaptive meshing and MATC parameters, 2D steady state
Replies: 2
Views: 5416

Re: simple adaptive meshing and MATC parameters, 2D steady state

Hi The VTU output problem is now fixed. There was a problem in that when we changed to case sensitive keyword (File vs. String) the matching of "Mesh Name" broke down. It would have workd with lowercase values only... Now fixed in devel. To my understanding there is only the problem of MATC & ElmerG...
by raback
21 Jan 2019, 14:32
Forum: ElmerSolver
Topic: Element 'flipping' in a large displacement problem
Replies: 4
Views: 108

Re: Element 'flipping' in a large displacement problem

Hi

Did you use the "ElasticSolve" capable for large displacements? If you did, was nonlinear system convergence obtained?

You might apply the load gradually with such large displacements.

-Peter
by raback
18 Jan 2019, 18:21
Forum: ElmerSolver
Topic: Problem calculating the magnetic energy of two coils
Replies: 9
Views: 296

Re: Problem calculating the magnetic energy of two coils

Hi Marco, I don't blame you for the confusion - it is actually the other way around. Usually source terms and body forces and boundary conditions in Elmer are distributed. I.e. the unit of "Current Density" is A/m^2. The idea is that we should not need any geometric information to interpret a keywor...
by raback
18 Jan 2019, 12:52
Forum: ElmerSolver
Topic: Problem calculating the magnetic energy of two coils
Replies: 9
Views: 296

Re: Problem calculating the magnetic energy of two coils

Hi,

This is a follow-up to this thread that utilizes the CoilSolver to set currents in closed coils. Does not work always, but some observations are still valid also for this case.

viewtopic.php?f=3&t=6553

-Peter
by raback
18 Jan 2019, 12:47
Forum: ElmerSolver
Topic: Defining coils currents / five coils example
Replies: 0
Views: 75

Defining coils currents / five coils example

Hi All, There are multiple ways in Elmer to define coil currents in hierarchical simulations for the Whitney AV solver to compute magnetic fields. Basically one can give "Current Density i", i=1,2,3 or "Electric Potential" which is used to internally compute the current sources in the AV solver. Now...
by raback
17 Jan 2019, 12:51
Forum: Bug reports
Topic: elmergrid regressions
Replies: 4
Views: 297

Re: elmergrid regressions

Hi I looked at some of the errors. For example, there was new check for very long lines and this failed if the line ended not to end-of-line (\n) but to end-of-file (\0). This has now been fixed. Basically I don't think there is any other real problem than the missing of MATC which occured when Elme...