Absence of a term in adjointShapeOptimizationFoam outlet boundary conditions
I have a question about boundary conditions of adjointShapeOptimizationFoam. In particular, following Othmer's procedure in A continuous adjoint formulation for the computation of topological and surface sensitivities of ducted flows, boundary conditions for the Outlet are:
but I can't find and in adjointOutletPressureFvPatchScalarField.C and adjointOutletVelocityFvPatchScalarField.C.
Are they neglected because they are irrelevant or is simply the normal gradient of adjoint velocity forced to be null?
I have exactly the same doubt, since in the code:
Let's hope for some help :)
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