Path: blob/devel/elmerice/Tests/Buoyancy/buoyancy.sif
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check keywords warn
echo on
$yearinsec = 365.25*24*60*60
$rhoi = 900.0/(1.0e6*yearinsec^2)
$rhow = 1000.0/(1.0e6*yearinsec^2)
Header
Mesh DB "." "mesh"
End
Constants
! For the Buoyancy User function
Buoyancy Use Basal Melt = Logical True
Bottom Surface Name = String "Zs Bottom"
Water Density = Real $rhow
End
!---------------------------------------------------
!---------------- SIMULATION -----------------------
!---------------------------------------------------
Simulation
Coordinate System = Cartesian 2D
Simulation Type = Transient
Timestepping Method = "bdf"
BDF Order = 1
Timestep Intervals = 5
Output Intervals = 1
Timestep Sizes = 1.0
Steady State Max Iterations = 1 !20
Steady State Min Iterations = 1
Post File = "buoyancy.vtu"
max output level = 4
End
!---------------------------------------------------
!---------------- BODIES ---------------------------
!---------------------------------------------------
!! the ice core (3d)
Body 1
Name = "ice"
Equation = 1
Body Force = 1
Material = 1
Initial Condition = 1
End
Body 2
Name= "top free surface"
Equation = 2
Material = 1
Body Force = 2
Initial Condition = 2
End
Body 3
Name= "free surface sea/ice-shelf"
Equation = 3
Material = 1
Body Force = 3
Initial Condition = 3
End
!---------------------------------------------------
!---------------- INITIAL CONDITIONS ---------------
!---------------------------------------------------
!! for ice core
Initial Condition 1
Pressure = Real 0.0e0
Velocity 1 = Real 0.0e0
Velocity 2 = Real 0.0e0
End
!! for top free surface
Initial Condition 2
ZsTopIni = Equals Coordinate 2
Zs Top = Equals Coordinate 2
End
!! For free surface sea/ice-shelf
Initial Condition 3
ZsBottomIni = Equals Coordinate 2
Zs Bottom = Equals Coordinate 2
End
!---------------------------------------------------
!---------------- BODY FORCES ----------------------
!---------------------------------------------------
Body Force 1
Flow BodyForce 1 = Real 0.0
Flow BodyForce 2 = Real -9.746289e15 !MPa - a - m
Mesh Update 1 = Real 0.0
End
Body Force 2
!! accumulation flux in m/year
!! positive number
Zs Top Accumulation Flux 1 = Real 0.0e0
Zs Top Accumulation Flux 2 = Real 0.5e0
End
Body Force 3
!! melting/accretion under ice/shelf
!! positive for melting
!! negative for accretion
Zs Bottom Accumulation = Real 0.5e0
End
!---------------------------------------------------
!---------------- MATERIALS ------------------------
!---------------------------------------------------
!! ice material properties in MPa - m - a system
Material 1
Density = Real $rhoi
Viscosity = Real 5.412374e-1
Viscosity Model = String "power law"
Viscosity Exponent = Real $1.0/3.0
Critical Shear Rate = Real 1.0e-10
Sea level = Real 0.0
!! Surface condition
Min Zs Top = REal -1.0e6
Max Zs Top = Real 1.0e6
!! Bed condition
Min Zs Bottom = Real -1.0e6
Max Zs Bottom = Real 1.0e6
!! for computeDevStress
Cauchy = Logical True
End
!---------------------------------------------------
!---------------- SOLVERS --------------------------
!---------------------------------------------------
Solver 1
Equation = "Navier-Stokes"
Linear System Solver = Direct
Linear System Direct Method = Umfpack
Nonlinear System Max Iterations = 50
Nonlinear System Convergence Tolerance = 1.0e-5
Nonlinear System Newton After Iterations = 100
Nonlinear System Newton After Tolerance = 1.0e-06
Nonlinear System Relaxation Factor = 1.00
Steady State Convergence Tolerance = Real 1.0e-4
Stabilization Method = String Bubbles
Flow Model = String "Stokes"
Exported Variable 1 = Flow Solution Loads[Stress Vector:2 CEQ Residual:1]
Calculate Loads = Logical True
End
Solver 2
Equation = "Free Surface Top"
Variable = "Zs Top"
Variable DOFs = 1
Exported Variable 1 = "Zs Top Residual"
Exported Variable 1 DOFs = 1
Exported Variable 2 = "ZsTopIni"
Exported Variable 2 DOFs = 1
Procedure = "FreeSurfaceSolver" "FreeSurfaceSolver"
!Before Linsolve = "EliminateDirichlet" "EliminateDirichlet"
Linear System Solver = Iterative
Linear System Max Iterations = 1500
Linear System Iterative Method = BiCGStab
Linear System Preconditioning = ILU0
Linear System Convergence Tolerance = Real 1.0e-5
Linear System Abort Not Converged = False
Linear System Residual Output = 1
Linear System Use Hypre = Logical False
Nonlinear System Max Iterations = 100
Nonlinear System Convergence Tolerance = 1.0e-6
Nonlinear System Relaxation Factor = 1.00
Steady State Convergence Tolerance = 1.0e-03
Stabilization Method = Stabilized
Apply Dirichlet = Logical True
! How much the free surface is relaxed
! Relaxation Factor = Real 1.0
End
Solver 3
Equation = "Free Surface Sea/Shelf"
Variable = "Zs Bottom"
Variable DOFS = 1
Exported Variable 1 = "Zs Bottom Residual"
Exported Variable 1 DOFs = 1
Exported Variable 2 = "ZsBottomIni"
Exported Variable 2 DOFs = 1
Procedure = "FreeSurfaceSolver" "FreeSurfaceSolver"
!Before Linsolve = "EliminateDirichlet" "EliminateDirichlet"
Linear System Solver = Iterative
Linear System Max Iterations = 1500
Linear System Iterative Method = BiCGStab
Linear System Preconditioning = ILU0
Linear System Convergence Tolerance = Real 1.0e-9
Linear System Abort Not Converged = False
Linear System Residual Output = 1
Linear System Use Hypre = Logical False
Nonlinear System Max Iterations = 100
Nonlinear System Convergence Tolerance = 1.0e-6
Nonlinear System Relaxation Factor = 1.00
Steady State Convergence Tolerance = 1.0e-03
Stabilization Method = Stabilized
Apply Dirichlet = Logical True
! How much the free surface is relaxed
! Relaxation Factor = Real 1.0
End
Solver 4
!Exec Solver = Never
Equation = "Mesh Update"
Linear System Solver = "Direct"
Linear System Direct Method = Umfpack
Steady State Convergence Tolerance = 1.0e-04
End
Solver 5 !la surface du haut ne doit pas bouger
Exec Solver = After TimeStep
Equation = SaveScalars
Procedure = File "SaveData" "SaveScalars"
Filename = "results.dat"
File Append = Logical True
Variable 1 = String "Time"
Variable 2 = String "Zs Top"
Operator 2 = String "int"
Variable 3 = String "Zs Top"
Operator 3 = String "max"
Variable 4 = String "Zs Top"
Operator 4 = String "min"
Operator 5 = String "cpu time"
End
!---------------------------------------------------
!---------------- EQUATIONS ------------------------
!---------------------------------------------------
Equation 1
Active Solvers(3) = 1 4 5
End
Equation 2
Active Solvers(1) = 2
!! options pour le free surface (top)
Flow Solution Name = String "Flow Solution"
Convection = String Computed
End
Equation 3
Active Solvers(1) = 3
!! options pour le free surface (bottom)
Flow Solution Name = String "Flow Solution"
Convection = String Computed
End
!---------------------------------------------------
!---------------- BOUNDARY CONDITIONS --------------
!---------------------------------------------------
!! BC Bedrock + Shelf
Boundary Condition 1
Name = "bottom"
Target Boundaries = 1
Body Id = 3
Flow Force BC = Logical True
!
! Shelf conditions
!
External Pressure = Variable Coordinate 2
Real Procedure "ElmerIceUSF" "SeaPressure"
Slip Coefficient 2 = Variable Coordinate 2
Real Procedure "ElmerIceUSF" "SeaSpring"
Mesh Update 1 = Real 0.0
Mesh Update 2 = Variable Zs Bottom, ZsBottomIni
Real MATC "tx(0)-tx(1)"
Compute Sea Pressure = Logical True
Compute Sea Spring = Logical True
End
!! BC Lateral Ice-Shelf (air or sea contact)
Boundary Condition 2
Name = "front"
Target Boundaries = 2
Mesh Update 1 = Real 0.0
Velocity 1 = Real 0.0
End
!! BC Free surface Top
Boundary Condition 3
Name = "top"
Target Boundaries = 3
Body Id = 2
Mesh Update 1 = Real 0.0e0
Mesh Update 2 = Variable Zs Top, ZsTopIni
Real MATC "tx(0)-tx(1)"
End
!! Symmetry axis
Boundary Condition 4
Name = "back"
Target Boundaries = 4
Velocity 1 = Real 0.0
Mesh Update 1 = Real 0.0
End
Solver 2 :: Reference Norm = Real 9.9999999
Solver 2 :: Reference Norm Tolerance = Real 1E-06