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Adjoint pitzDaily Tutorial Evaluation

  • Take a look at what is the benefit of the optimization.
  • For internal flows the critical quantity is usually the pressure drop.
  • Pressure drop can be defined as a difference between the inlet and the outlet pressure. It can be understood as a measure of how much of energy is needed to make fluid flow through.
  • For smooth and efficient flows, the engineers want to reduce the pressure drop as much as possible.
  • Do the following experiment:
    1. Run the adjoint pitzDaily tutorial with adjointShapeOptimizationFoam solver
    2. Run the pitzDaily tutorial with simpleFoam solver
    3. Evaluate and compare the pressure drop of both.


  • Run this tutorial both with adjointShapeOptimizationFoam and simpleFoam; evaluate the average pressure in the inlet (there is zero pressure at the outlet anyway):
    # adjointShapeOptimizationFoam
    # postProcess -func 'patchAverage(name=inlet,p)' -latestTime
    # simpleFoam
    # postProcess -func 'patchAverage(name=inlet,p)' -latestTime
  • Conclusion: The static pressure at the inlet is lower in the adjoined (optimized) case than in the non-optimized case. So, the geometry can be optimized this way.