Search found 3420 matches

by raback
25 Jun 2019, 12:35
Forum: ElmerSolver
Topic: Problem with total energy in Electrostacis/StatElecSolve model
Replies: 2
Views: 45

Re: Problem with total energy in Electrostacis/StatElecSolve model

Hi What is the problem? Can the cross-capacitance of the pixels not explain this. If you have potential at either 0 or 100 I would guess that a mix would result to the highest energy. Note that you may introduce electrostatic energy when you set any Dirichlet condition, be it 0 or 100. Comparing jus...
by raback
25 Jun 2019, 12:23
Forum: ElmerSolver
Topic: Coupling Elmer and DDD
Replies: 3
Views: 54

Re: Coupling Elmer and DDD

Hi, you typically need to request "calculate stresses". Then you may operate with the stress as any other field variable. -Peter
by raback
25 Jun 2019, 12:15
Forum: ElmerSolver
Topic: CoilSolver: Unlisted keywords
Replies: 7
Views: 52

Re: CoilSolver: Unlisted keywords

Hi The keyword might sometimes be listed in the documentation but not in the SOLVER.KEYWORDS. We have automated the process of listing all unlisted keywords from the test suite but there is no such automate to take the keywords from documentation. Hence this could happen. Do the keywords not affect ...
by raback
25 Jun 2019, 12:09
Forum: General
Topic: Turek Hron Benchmark case in Elmer (both CFD and CSM)
Replies: 5
Views: 50

Re: Turek Hron Benchmark case in Elmer (both CFD and CSM)

Hi Anjali, The Turek Hron benchmark is intended to be very difficult requiring special techniques. It would be a challenge to obtain convergence with any two loosely coupled software. You don't need OpenFOAM here since the fluid problem is not too difficult. It is the coupling that is the tricky par...
by raback
14 Jun 2019, 16:39
Forum: General
Topic: [SOLVED]convergence history view window missing
Replies: 8
Views: 1269

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: 460

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: 70

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: 173

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: 190

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: 131

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...