• Solver Fortran File: ForceToStress.f90
• Solver Name: ForceToStress
• Required Output Variable(s): Stress (user defined)
• Required Input Variable(s): Force
• Optional Output Variable(s): None
• Optional Input Variable(s): None

For a given boundary, this solver computes the nodal stress equivalent to a given nodal normal force. This can be used also to infer the flux from the knowledge of a debit. 

<code>
Solver 1
  Equation = "Navier-Stokes"
  Stabilization Method = String Stabilized
  Flow Model = Stokes

  ...

  Exported Variable 1 = Flow Solution Loads[Fx:1 Fy:1 Fz:1 CEQ Residual:1 ]
  Calculate Loads = Logical True
  
  Exported Variable 2 = Force        
  Exported Variable 2 DOFS = Integer 1
End

Solver 2
    Equation = "ForceToStress"
    Procedure = File "./ForceToStress" "ForceToStress"
    Variable = String "Stress"
    Variable DOFs = 1

    Linear System Solver = Direct
    Linear System Direct Method = umfpack
 End

! Solve this for body Id 2 (=boundary 3 here)
Equation 2
  Active Solvers(1) = 2
End

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Boundary Condition 3
  Target Boundaries = 5
  Body Id = 2
  ..
  Force = Equals Fz
End

Download an example using the FlowDepth Solver. TODO