But what creates the vortex? The TGD based quantum hydrodynamics leads to a view about how vortices are generated and how they decay. The vortex around the airfoil would be accompanied by magnetic flux structure, which is quantum coherent in the scale of the object. The generation of the vortex would compensate for the momentum loss of fluid as the boundary layer is formed.
The variational principle of Taha can be translated to the TGD framework. Also a simpler variational principle based on Z0 magnetic energy is considered. In the TGD framework the velocity field is assumed to be proportional to Z0 gauge potential: this assumption generalizes a similar assumption in superconductivity. This implies a quantization of velocity circulation as multiplies of effective Planck constant heff=nh0 having as largest values the gravitational Planck constant hgr= GMm/\beta0 for Earth and Sun.
For a summary of earlier postings see Latest progress in TGD.