Run Time Error

[raback]

Hi Al,

This is not a related problem. Anaway, sharing the sif file would help. Its probably a syntax problem therein.

-Peter

[Juha]

Hi all,

i added some 'large file support' to svn trunk. Still on 32bit windows ElmerSolver must
be built using very recent development version of gcc/gfortran. The Elmer nightly
windows build is not yet there...

Juha

[Al.X]

Hi Peter,

thanks for the fast answer. Here's my sif-file:

Code: Select all

Check Keywords Warn

Header
  Mesh DB "." "ind_heat_2D_7"
  Include Path ""
  Results Directory ""
End

Simulation
  Coordinate System = "Axi Symmetric"
  Simulation Type = Steady State
  Steady State Max Iterations = 30
  Output Intervals = 1
  Output File = "ind_heat_2D_7.result"
  Post File = "ind_heat_2D_7.ep"
End

Constants
  Permittivity Of Vacuum = 8.8542e-12
  Stefan Boltzmann = 5.67e-8
End

Body Force 1
  Current Density = 2.5e5
End

Body Force 2
  Heat Source = Equals Joule Heating
End

Body 1
  Name = "Air"
  Equation = 1
  Material = 1
End

Body 2
  Name = "Coil_1"
  Equation = 1
  Material = 1
  Body Force = 1
End

Body 3
  Name = "Coil_2"
  Equation = 1
  Material = 1
  Body Force = 1
End

Body 4
  Name = "Workpiece"
  Equation = 1
  Material = 2
  Body Force = 2
End

Equation 1
  Name = "Vector Potential Equation"
  Active Solvers(2) = Integer 1 2
  Calculate Joule Heating = True
End

Solver 1
  Equation = Potential Solver
  Variable = Potential
  Variable DOFs = 2

  Angular Frequency = Real 20.0e3
  Calculate Joule Heating = Logical True
  Calculate Magnetic Flux = Logical True
  Desired Heating Power = Real 3.0e3

  Procedure = "StatMagSolve" "StatMagSolver"
  Linear System Solver = Iterative
  Linear System Iterative Method = BiCGStab
  Linear System Max Iterations = 300
  Linear System Convergence Tolerance = 1.0e-10
  Linear System Preconditioning = ILU1
  Linear System ILUT Tolerance = 1.0e-03
  Linear System Residual Output = 1
  Nonlinear System Max Iterations = 1
  Nonlinear System Convergence Tolerance = 1.0e-6
  Nonlinear System Relaxation Factor = 1
  Steady State Convergence Tolerance = 1.0e-6
End

Solver 2
  Equation = Heat Equation
  Variable = Temperature
  Variable DOFs = 1
  
  Linear System Solver = Iterative
  Linear System Iterative Method = BiCGStab
  Linear System Preconditioning = ILU1
  Linear System Max Iterations = 350
  Linear System Convergence Tolerance = 1.0e-9
  Nonlinear System Max Iterations = 1
  Nonlinear System Convergence Tolerance = 1.0e.07
  Nonlinear System Newton After Iterations = 3
  Nonlinear System Newton After Tolerance = 1.0e-12
  Nonlinear System Relaxation Factor = 0.5
  Steady State Convergence Tolerance = 1.0e-07
End

Material 1
  Name = "Air"
  Electric Conductivity = 0.0
  Heat Conductivity = 0.0261
End

Material 2
  Name = "Workpiece"
  Electric Conductivity = 1.8E4
  Heat Conductivity = 32.8
End

Boundary Condition 1
  Target Boundaries = 1
  Potential 1 = Real 0.0
  Potential 2 = Real 0.0
  Temperature = 298
End

Boundary Condition 2
  Target Boundaries = 2
  Potential 1 = Real 0.0
  Potential 2 = Real 0.0
  Temperature = 298
End

Boundary Condition 3
  Target Boundaries = 3
  Potential 1 = Real 0.0
  Potential 2 = Real 0.0
  Temperature = 298
End

Boundary Condition 4
  Target Boundaries = 4
  Potential 1 = Real 0.0
  Potential 2 = Real 0.0
  Temperature = 298
End

!End Of File

I hope, this could help!

best regards

[Juha]

HI,

> Nonlinear System Convergence Tolerance = 1.0e.07

In "Solver 2"-section of the .sif file you have a malformed
number in the above setting.

Regards, Juha

[Al.X]

Hi Juha,

thank you very much, you're right! It's working!

I think I haven't seen the forest for the trees!!

Best regards!!

Al.X

[Juha]

Hi,

i've been doing some digging 'bout the apparent 2GB limit to ElmerSolver results
files when run on a 32 bit Windows system. As it turns out, the limit is still there,
even if compiled with recent gcc. This is due to a bug in gfortrans io-library. I'll
keep you posted on the developments, but it might take a while more to have this
fixed....

Regards, Juha

P.S. You of course also need a file system capable of supporting large files, such
as NTFS. FAT32 on windows systems, by definition, does not support large files.

[JBA]

Does anyone have an example of a successful heat equation + induction (i.e., temperature contours)? SIF and GRID? that they would be willing to share?

Regards,
Jeff

[raback]

Hi

There is a newish example in tests/InductionHeating2, see
http://elmerfem.svn.sourceforge.net/vie ... nHeating2/

-Peter

[JBA]

Thank you Peter--That's perfect!

Jeff

[mzenker]

Hi,

I reacitvate this thread because I have just met a similar problem: big mesh file and many timesteps. After 544 / 100 steps, I get

At line 2538 of file ModelDescription.f90 (unit = 31, file = '')
Fortran runtime error: Invalid argument

Elmer Rev. 5526, WIN XP 32 bit.

I have specified an output file to take as restart file for a subsequent simulation run, which has grown to ~2 GB at the time of the solver crash, so i think the cause is there. The Elmerpost file has "only" 790 MB. I need only the results of the last time step for the restart file. So my questions are:

1) Is there a means not to store all timestep results in the output file? Or can I tell the solver to write a separate output file for every time step?
2) Are there other file formats (e.g. produced by the result output solver) which can be used as restart file?

Thank you,

Matthias