Hi all,
I have been trying to run tutorial 5 in the ElmerGUI tutorial. There are 2 balls enclosed inside a far field sphere. How do I get to the enclosed spheres to set their characteristics. The manual shows a nice cutaway of the far field sphere but ElmerGUI has no such capability that I can find. How do I handle this example?
Gary R.
ElmerGUI Tutorial 5 (Electrostatics Capacitance)

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Re: ElmerGUI Tutorial 5 (Electrostatics Capacitance)
Hi
I recommend always using Paraview (and .vtu files for output) since paraview has all the features you could wish for, and a huge user community to support you.
Neither ElmerPost or the VTK widget of ElmerGUI are developed any more.
Peter
I recommend always using Paraview (and .vtu files for output) since paraview has all the features you could wish for, and a huge user community to support you.
Neither ElmerPost or the VTK widget of ElmerGUI are developed any more.
Peter
Re: ElmerGUI Tutorial 5 (Electrostatics Capacitance)
Thanks for the reply.
I do use Paraview for output display and completely agree that it is the only way to go. But my problem occurs before the paraview file is produced. My problem is at the mesh file level. I can't get to the enclosed bodies to set their model characteristics.
Gary R
I do use Paraview for output display and completely agree that it is the only way to go. But my problem occurs before the paraview file is produced. My problem is at the mesh file level. I can't get to the enclosed bodies to set their model characteristics.
Gary R
Re: ElmerGUI Tutorial 5 (Electrostatics Capacitance)
Hi,
you can try to zoom in until you see the inner bodies. You can also select the outer body/boundary and use "View>Hide/Show selected" to hide it and be able to select the inner bodies. Alternatively, if you know the number of the body (or boundary), you can check it in the dialogs for material, bodyforce and boundary condition.
HTH,
Matthias
you can try to zoom in until you see the inner bodies. You can also select the outer body/boundary and use "View>Hide/Show selected" to hide it and be able to select the inner bodies. Alternatively, if you know the number of the body (or boundary), you can check it in the dialogs for material, bodyforce and boundary condition.
HTH,
Matthias
Re: ElmerGUI Tutorial 5 (Electrostatics Capacitance)
A belated thanks for the reply. So simple. I missed the Ctl H key thing. That solved the initial problem but uncovered another. My solver log is as follows:
As you can see, the solver errors out. My SIF file is as follows:
What am I doing wrong?
Gary R.
Code: Select all
ELMER SOLVER (v 8.3) STARTED AT: 2018/01/13 18:03:12
ParCommInit: Initialize #PEs: 1
WARNING:: MAIN: OMP_NUM_THREADS not set. Using only 1 thread.
MAIN:
MAIN: =============================================================
MAIN: ElmerSolver finite element software, Welcome!
MAIN: This program is free software licensed under (L)GPL
MAIN: Copyright 1st April 1995  , CSC  IT Center for Science Ltd.
MAIN: Webpage http://www.csc.fi/elmer, Email elmeradm@csc.fi
MAIN: Version: 8.3 (Rev: unknown, Compiled: 20171206)
MAIN: Trilinos library linked in.
MAIN: MUMPS library linked in.
MAIN: =============================================================
MAIN:
MAIN:
MAIN: 
MAIN: Reading Model: case.sif
LoadInputFile: Scanning input file: case.sif
LoadInputFile: Loading input file: case.sif
Loading user function library: [StatElecSolve]...[StatElecSolver_Init0]
LoadMesh: Base mesh name: ./.
LoadMesh: Elapsed REAL time: 0.4010 (s)
WARNING:: CheckTimer: Requesting time from nonexisting timer: LoadMesh
WARNING:: CheckTimer: Requesting time from nonexisting timer: MeshStabParams
MAIN: 
AddVtuOutputSolverHack: Adding ResultOutputSolver to write VTU output in file: case
Loading user function library: [StatElecSolve]...[StatElecSolver_Init]
Loading user function library: [StatElecSolve]...[StatElecSolver_bulk]
Loading user function library: [StatElecSolve]...[StatElecSolver]
OptimizeBandwidth: 
OptimizeBandwidth: Computing matrix structure for: electrostatics...done.
OptimizeBandwidth: Half bandwidth without optimization: 35994
OptimizeBandwidth:
OptimizeBandwidth: Bandwidth Optimization ...done.
OptimizeBandwidth: Half bandwidth after optimization: 3166
OptimizeBandwidth: 
Loading user function library: [ResultOutputSolve]...[ResultOutputSolver_Init]
Loading user function library: [ResultOutputSolve]...[ResultOutputSolver_bulk]
Loading user function library: [ResultOutputSolve]...[ResultOutputSolver]
MAIN:
MAIN: 
MAIN: Steady state iteration: 1
MAIN: 
MAIN:
SingleSolver: Attempting to call solver
SingleSolver: Solver Equation string is: electrostatics
ERROR:: StatElecSolve: Capacitance calculation requested without any > Capacitance Body <
Note: The following floatingpoint exceptions are signalling: IEEE_INVALID_FLAG
Code: Select all
Header
CHECK KEYWORDS Warn
Mesh DB "." "."
Include Path ""
Results Directory ""
End
Simulation
Max Output Level = 5
Coordinate System = Cartesian
Coordinate Mapping(3) = 1 2 3
Simulation Type = Steady state
Steady State Max Iterations = 1
Output Intervals = 1
Timestepping Method = BDF
BDF Order = 1
Solver Input File = case.sif
Post File = case.vtu
End
Constants
Gravity(4) = 0 1 0 9.82
Stefan Boltzmann = 5.67e08
Permittivity of Vacuum = 1.0
Boltzmann Constant = 1.3807e23
Unit Charge = 1.602e19
End
Body 1
Target Bodies(1) = 1
Name = "Body 1"
Equation = 1
Material = 1
End
Solver 1
Equation = Electrostatics
Calculate Capacitance Matrix = True
Variable = Potential
Procedure = "StatElecSolve" "StatElecSolver"
Calculate Electric Field = True
Calculate Electric Energy = True
Exec Solver = Always
Stabilize = True
Bubbles = False
Lumped Mass Matrix = False
Optimize Bandwidth = True
Steady State Convergence Tolerance = 1.0e5
Nonlinear System Convergence Tolerance = 1.0e7
Nonlinear System Max Iterations = 20
Nonlinear System Newton After Iterations = 3
Nonlinear System Newton After Tolerance = 1.0e3
Nonlinear System Relaxation Factor = 1
Linear System Solver = Iterative
Linear System Iterative Method = BiCGStab
Linear System Max Iterations = 500
Linear System Convergence Tolerance = 1.0e10
BiCGstabl polynomial degree = 2
Linear System Preconditioning = Diagonal
Linear System ILUT Tolerance = 1.0e3
Linear System Abort Not Converged = False
Linear System Residual Output = 1
Linear System Precondition Recompute = 1
End
Equation 1
Name = "Electorstatics"
Active Solvers(1) = 1
End
Material 1
Name = "Ideal"
Relative Permittivity = 1.0
End
Boundary Condition 1
Target Boundaries(1) = 3
Name = "FarField"
Electric Infinity BC = True
End
Boundary Condition 2
Target Boundaries(1) = 1
Name = "CapBody1"
End
Boundary Condition 3
Target Boundaries(1) = 2
Name = "CapBody2"
End
Gary R.
Re: ElmerGUI Tutorial 5 (Electrostatics Capacitance)
I don't know if it is too late but I had the same problem. The solution is to give a value to the field "capacitance body" in the BC tab. This should be an index which then makes up the (i,j)'s of the capacitance matrix.