Search found 3416 matches

by raback
14 Jun 2019, 16:39
Forum: General
Topic: [SOLVED]convergence history view window missing
Replies: 8
Views: 1179

Re: [SOLVED]convergence history view window missing

Hi

In your build script do you have

Code: Select all

-DWITH_QWT:BOOL=TRUE \ 
QWT is the open source library that makes the plots. I would guess its written in C++ using Qt.

-Peter
by raback
05 Jun 2019, 17:01
Forum: ElmerPost
Topic: Extracting results data from Elmer
Replies: 11
Views: 233

Re: Extracting results data from Elmer

Change "deflection" to "deflection 3". -Peter
by raback
02 Jun 2019, 15:19
Forum: General
Topic: Can I simulate Newtons Rings with Elmer? (Light)
Replies: 1
Views: 43

Re: Can I simulate Newtons Rings with Elmer? (Light)

Hi

This would basically be solver by VectorHelholtzSolver as complex valued electrical field. However, the wave number is easily so large that the simulation becomes impractical. In FE you need at least 10 elements per wave so you can calculate the number of elements requires in 2D and 3D.

-Peter
by raback
30 May 2019, 18:53
Forum: ElmerGUI
Topic: Benchmark problems
Replies: 7
Views: 96

Re: Benchmark problems

Hi The ElmerGUI tutorials are intended to be educational simple cases that can be defined in rather short time by first time users of Elmer. They have been part of the material that we use on the courses. Usually tutorials are not benchmark problems that would verify performance or correctness of co...
by raback
27 May 2019, 15:48
Forum: ElmerGUI
Topic: how to add impulses in Elmer
Replies: 7
Views: 136

Re: how to add impulses in Elmer

Hi chen, Why don't you look at test case "ArteryOutlet" under $ELMERSRC/fem/test. It comes with coupled fluid-structure & mesh update 1D non-reflective outlet model with on-the-fly defined mesh pulse defined in an UDF function To have all these defined in the GUI is not currently practical as there ...
by raback
27 May 2019, 15:41
Forum: ElmerSolver
Topic: Limiting possible internal fluid pressure in Navier-Stokes simulation
Replies: 2
Views: 97

Re: Limiting possible internal fluid pressure in Navier-Stokes simulation

Hi Thomas I don't think the general limiters will work in Navier-Stokes. It might be possible to have them but I would guess some coding would be needed to limit the soluton. You could of course try. Take a case of elasticity where a component is limited and mimic it for Pressure in Navier-Stokes. A...
by raback
22 May 2019, 00:04
Forum: External tools
Topic: Scalar field inconsistency at geometry face border?
Replies: 10
Views: 128

Re: Scalar field inconsistency at geometry face border?

Hi This seems to be quite peculiar behavior. I would guess that it is a combination of extreme mesh density and poorly converging iterative solver. Fine mesh density increases the number of iterations needed and perhaps you terminated the iteration before this region had converged. You could try to ...
by raback
13 May 2019, 21:40
Forum: ElmerSolver
Topic: Result becames strange in an edited model
Replies: 6
Views: 163

Re: Result becames strange in an edited model

Hi One thing I noticed is that you give "emissivity" for "air". Try to take it away. Now the radiation BCs require 1) emissity and 2) normal direction. You can nicely do this simply by given emissity to the solid parts which truly form the surfaces and radiate outwards. If you also give air the emis...
by raback
13 May 2019, 21:32
Forum: ElmerSolver
Topic: Damping in StressSolver
Replies: 7
Views: 232

Re: Damping in StressSolver

Kevin, nice work in the verification! _peter
by raback
13 May 2019, 21:30
Forum: General
Topic: Application to complex mechanical assembly
Replies: 2
Views: 124

Re: Application to complex mechanical assembly

Have to agree here. For pure mechanical problems I would go with dedicated codes. -Peter