elmer_flow_amgx.sif

!---LUA BEGIN
! maxv=0.2
! L=5.0
!---LUA END

Header
  CHECK KEYWORDS Warn
  Mesh DB "." "elmer_flow"
  Include Path ""
  Results Directory ""
End

Simulation
  Max Output Level = 5
  Coordinate System = Cartesian
  Coordinate Mapping(3) = 1 2 3
  Simulation Type = Transient
  Steady State Max Iterations = 1
  Output Intervals = 1
  Timestepping Method = BDF
  BDF Order = 1
  Timestep intervals = 20
  Timestep Sizes = 1.0
  Post File = flow_amgx.vtu
End

Constants
  Gravity(4) = 0 -1 0 9.82
  Stefan Boltzmann = 5.67e-08
  Permittivity of Vacuum = 8.8542e-12
  Boltzmann Constant = 1.3807e-23
  Unit Charge = 1.602e-19
End

Body 1
  Target Bodies(1) = 1
  Name = "Body 1"
  Equation = 1
  Material = 1
  Initial Condition = 1
End



Solver 1
  Equation = "Stokes-Vec"
  Procedure = "IncompressibleNSVec" "IncompressibleNSSolver"
  !Div-Curl Discretization = Logical False

 ! Optimize Bandwidth = Logical True
  !Flow Model = Stokes
  Stabilization Method = String Stabilized

  !Non-linear iteration settings:
  !------------------------------ 
  Nonlinear System Max Iterations = 1
  Nonlinear System Convergence Tolerance  = 1.0e-5
  Nonlinear System Newton After Iterations = 5
  Nonlinear System Newton After Tolerance = 1.0e-1
  ! Nonlinear System Relaxation Factor = 1.00
  ! Nonlinear System Reset Newton = Logical True

  ! AMGX solver
  Linear System Solver = AMGX
  AMGX config = String "config.json"

  ! Convergence on timelevel (not required here)
  !---------------------------------------------
  Steady State Convergence Tolerance = Real 1.0e-3

  !Relative Integration Order = -1
  Number of Integration Points = Integer 21 ! 21, 28, 44, 64, ...

  ! 1st iteration viscosity is constant
  !Constant-Viscosity Start = Logical True

! Some timing info
  Boundary Assembly Timing = Logical True
  Bulk Assembly Timing = Logical True
  Solver Timing = Logical True
  Linear System Timing = Logical True
End





Equation 1
  Name = "Equation 1"
  Convection = Computed
  Active Solvers(1) = 1
End

Material 1
  Name = "Oil, olive (25 C)"
  Viscosity = 0.081
  Heat expansion Coefficient = 0.72e-3
  Heat Conductivity = 0.17
  Relative Permittivity = 3.1
  Sound speed = 1430.0
  Heat Capacity = 1970.0
  Density = 915.0
End

Body Force 1
  Name = "BodyForce 1"
  !Flow BodyForce 1 = 0.0
End

Initial Condition 1
  !Temperature = Real 10.0
  !Pressure = Variable Coordinate 1
  !  Real LUA "gaugepressure*( 1 - (tx[0]/L))"
  Pressure = 0.0
  Velocity 1 = Variable Coordinate 2, Coordinate 3
   Real LUA "0.1*maxv*8*(tx[1])*(1-tx[1])*(tx[0])*(1-tx[0])"
  Velocity 2 = 0.0
  Velocity 3 = 0.0
End

Boundary Condition 1
  Target Boundaries(1) = 1 
  Name = "inflow"
  Velocity 2 = 0.0
  Velocity 3 = 0.0
  !Velocity 1 = Real #maxv
  Velocity 1 = Variable Time, Coordinate 2, Coordinate 3
    Real LUA "((0.9*maxv*(math.sin(0.5*math.pi*tx[0]/20.0))^2.0) + 0.1*maxv)*8*(tx[1])*(1-tx[1])*(tx[2])*(1-tx[2])"
  !External Pressure = Variable Time
  ! Real LUA "100*(math.sin(0.5*math.pi*tx[0]/50.0))^2.0"
  !Temperature = 10
End

Boundary Condition 2
  Target Boundaries(1) = 2 
  Name = "outflow"
  Pressure = 0.0
End

Boundary Condition 3
  Target Boundaries(4) = 3 4 5 6 
  Name = "no slip channel walls"
  !Heat Transfer Coefficient = 1.0
  !External Temperature = 10.0
  !Noslip wall BC = True
  !Normal-Tangential Velocity = True
  Velocity 1 = 0.0
  Velocity 2 = 0.0
  Velocity 3 = 0.0
End

Boundary Condition 4
  Target Boundaries(5) = 7 8 9 10 11
  Name = "Slip Letters"
  Normal-Tangential Velocity = True
  Velocity 1 = 0.0
End