Tutorial 21 Actuator driven with electrostatic currents
Posted: 24 Nov 2011, 20:58
Hello all,
the questions are right down at the bottom but I need first to give some explanations.
I am learning how to use Elmer GUI. I try to reproduce the tutorial 21 Thermal actuator driven with electrostatic currents in Elmer GUI.
- In this prospect I make sure that the Static Current Conduction solver was in the edf directory.
- I found on the internet the required .iges geometry file
- I realise a 3D mesh with the freeware gmsh-2.5.0
- I use Elmer GUI 6.2 and start to configure the solvers and define the main equation, material, body force, initial and Boundary conditions in accordance to the tutorial.
After these points I start the solver:
The problem converges after 24 steady state iterations (in the tutorial it was 27 but I don't use here the same mesh)
I notice in the solver console that I have two recursive errors in the iteration loops:
The first might be linked to the automatic mesh tool I use?
I understand the meaning of the second but what should I do now? modify the convergence tolerances?
Using the Postprocessor (VTK) I display the following results:
Potential:
Volume Current:
Temperature:
At this point I was hoping that the results match the ones in Tutorial but it isn't the case
-> MyResut_T_Max= 4460K // Tutorial_T_Max = 1113K
Temperature in the Elmer Tutorial 21:
PS: I also Edit the xml file statcurrent.xml to add a "Free text input"
I set Electric Conductivity = Variable Temperature
and write this code in the "Free text input" field. (it is also possible to edit the .sif file before running the solver)
Edit -----------------------------------------
I notice a possible error in the code given in the Elmer tutorial on page 105
should be 1.0e-6 instead of 1.0-6
QUESTIONS:
1) Why does my simulation results for the temperature differ from the Tutorial ones?
2) How can I get rid with the error ElementMetric: Degenerate 3D element: ?
I would be grateful if someone who already reproduces this tutorial gives me some help.
Best regards
Chris
I join the project data in a Zip file
the questions are right down at the bottom but I need first to give some explanations.
I am learning how to use Elmer GUI. I try to reproduce the tutorial 21 Thermal actuator driven with electrostatic currents in Elmer GUI.
- In this prospect I make sure that the Static Current Conduction solver was in the edf directory.
- I found on the internet the required .iges geometry file
- I realise a 3D mesh with the freeware gmsh-2.5.0
- I use Elmer GUI 6.2 and start to configure the solvers and define the main equation, material, body force, initial and Boundary conditions in accordance to the tutorial.
After these points I start the solver:
The problem converges after 24 steady state iterations (in the tutorial it was 27 but I don't use here the same mesh)
I notice in the solver console that I have two recursive errors in the iteration loops:
Code: Select all
ERROR:: ElementMetric: Degenerate 3D element: 0.0000000000000000
ERROR:: IterSolve: Failed convergence tolerances
I understand the meaning of the second but what should I do now? modify the convergence tolerances?
Using the Postprocessor (VTK) I display the following results:
Potential:
Volume Current:
Temperature:
At this point I was hoping that the results match the ones in Tutorial but it isn't the case
-> MyResut_T_Max= 4460K // Tutorial_T_Max = 1113K
Temperature in the Elmer Tutorial 21:
PS: I also Edit the xml file statcurrent.xml to add a "Free text input"
I set Electric Conductivity = Variable Temperature
and write this code in the "Free text input" field. (it is also possible to edit the .sif file before running the solver)
Code: Select all
Real
298.0 4.3478e10
498.0 1.2043e10
698.0 5.1781e9
898.0 2.7582e9
1098.0 1.6684e9
1298.0 1.0981e9
1683.0 1.0
2000.0 1.0
End
I notice a possible error in the code given in the Elmer tutorial on page 105
Code: Select all
Nonlinear System Convergence Tolerance = 1.0-6
QUESTIONS:
1) Why does my simulation results for the temperature differ from the Tutorial ones?
2) How can I get rid with the error ElementMetric: Degenerate 3D element: ?
I would be grateful if someone who already reproduces this tutorial gives me some help.
Best regards
Chris
I join the project data in a Zip file