I am first time working with ElmerGUI, and wanted to start with simple heat transfer on unfortunately not that simple body. Since I am quite new to this, I've generated body and unv file, and started looking at tutorials. I did material definitions, activated heat equation, and would say did everything according to the Tutorial 1 of "Elmer GUI Tutorials" document with few deviations:
- I didnt want a heat source, I wanted just to see heat distribution in object based on two different boundary conditions (two different environments)
- I didnt generate mesh in Elmer GUI, but I've imported unv gmsh file I've generated before in Salome.
With materials and boundary conditions defined on affected boundaries (surfaces) I did generate the next SIF file:
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) = 1
Solver Input File = case.sif
Post File = case.vtu
End
Constants
Gravity(4) = 0 -1 0 9.82
Stefan Boltzmann = 5.670374419e-08
Permittivity of Vacuum = 8.85418781e-12
Permeability of Vacuum = 1.25663706e-6
Boltzmann Constant = 1.380649e-23
Unit Charge = 1.6021766e-19
End
Body 1
Target Bodies(1) = 1
Name = "Body Property 1"
Equation = 1
Material = 1
End
Body 2
Target Bodies(1) = 2
Name = "Body Property 2"
Equation = 1
Material = 1
End
Body 3
Target Bodies(1) = 3
Name = "Body Property 3"
Equation = 1
Material = 2
End
Body 4
Target Bodies(1) = 4
Name = "Body 4"
Equation = 1
Material = 3
End
Body 5
Target Bodies(1) = 5
Name = "Body 5"
Equation = 1
Material = 4
End
Body 6
Target Bodies(1) = 6
Name = "Body 6"
Equation = 1
Material = 5
End
Body 7
Target Bodies(1) = 7
Name = "Body 7"
Equation = 1
Material = 6
End
Body 8
Target Bodies(1) = 8
Name = "Body 8"
Equation = 1
Material = 7
End
Body 9
Target Bodies(1) = 9
Name = "Body 9"
Equation = 1
Material = 8
End
Body 10
Target Bodies(1) = 10
Name = "Body 10"
Equation = 1
Material = 9
End
Body 11
Target Bodies(1) = 11
Name = "Body 11"
Equation = 1
Material = 3
End
Body 12
Target Bodies(1) = 12
Name = "Body 12"
Equation = 1
Material = 1
End
Body 13
Target Bodies(1) = 13
Name = "Body 13"
Equation = 1
Material = 1
End
Solver 1
Equation = Heat Equation
Procedure = "HeatSolve" "HeatSolver"
Calculate Loads = True
Variable = Temperature
Exec Solver = Always
Stabilize = True
Optimize Bandwidth = True
Steady State Convergence Tolerance = 1.0e-5
Nonlinear System Convergence Tolerance = 1.0e-7
Nonlinear System Max Iterations = 20
Nonlinear System Newton After Iterations = 3
Nonlinear System Newton After Tolerance = 1.0e-3
Nonlinear System Relaxation Factor = 1
Linear System Solver = Iterative
Linear System Iterative Method = BiCGStab
Linear System Max Iterations = 500
Linear System Convergence Tolerance = 1.0e-10
BiCGstabl polynomial degree = 2
Linear System Preconditioning = ILU0
Linear System ILUT Tolerance = 1.0e-3
Linear System Abort Not Converged = False
Linear System Residual Output = 10
Linear System Precondition Recompute = 1
End
Equation 1
Name = "Equation 1"
Active Solvers(1) = 1
End
Material 1
Name = "Leads Alloy42"
Heat Conductivity = 11
End
Material 2
Name = "Encapsulation resin Vitralit 1671"
Heat Conductivity = 1.8
End
Material 3
Name = "Solder SAC 305 Alloy"
Heat Conductivity = 50
End
Material 4
Name = "Backplate gold-alloy metalization"
Heat Conductivity = 21
End
Material 5
Name = "Si substrate"
Heat Conductivity = 0.9
End
Material 6
Name = "Si epitaxy"
Heat Conductivity = 0.9
End
Material 7
Name = "Si channel"
Heat Conductivity = 0.9
End
Material 8
Name = "SiO2 oxide"
Heat Conductivity = 1.4
End
Material 9
Name = "Aluminum front contact"
Heat Conductivity = 237
End
Boundary Condition 1
Target Boundaries(13) = 1 2 5 6 10 15 21 195 196 199 204 206 207
Name = "tempAirEnclosure"
External Temperature = 313.15
Heat Transfer Coefficient = 5
End
Boundary Condition 2
Target Boundaries(3) = 7 146 205
Name = "tempPCB"
Heat Transfer Coefficient = 15
External Temperature = 293.15
End
