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titleNewton-Osher:
  • Nonlinear solver:
    • Newton
  • Linear solver:
    • Preconditioner: Threshold-based Incomplete LU
    • Side: Left
    • Reordering type: Minimum discarded fill
  • Serial results:
    • Residual norm converges to 5.6482·10-14 after 38 iterations
    • Drag coefficient: CD = .5319 counts
    • Lift coefficient: CL = .9653 counts
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titleResidual convergence comparison:

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Adjoint solver tests:
Section
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titleWhat is being tested?

Listed below are the tolerances for the relevant data compared in the history files:

  • Adjoint residual: 10-12
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titleAdjoint solution:

For the primal solution, please refer to the Newton-ILU case above.

  • Adjoint parameters:
    • Adjoint solution computed using drag as output
    • Sensitivity parameter: Angle of attack
    • Forward sensitivities are computed (i.e. d(Drag)/dα with a tangent linearization)
  • Serial results:
    • Adjoint residual norm converges to 1.8574·10-15 after 2 iterations
    • dCD/dα (forward sensitivity): 1.6544·10-3
    • dCD/dα (adjoint): 1.6544·10-3

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Adaptation tests: