The New Theory of Flight presented on The Secret of Flight offers a new analysis of the central problem of separation in slightly viscous flow modeled by the Navier-Stokes equations with a slip boundary condition. This analysis is fundamentally different from the classical analysis by Prandtl of boundary layer separation with a no-slip boundary condition, which has dominated modern fluid mechanics.
Separation with slip show to take one of the following forms illustrated in the oil film visualizations above:
- Rotational separation with opposing flows (top)
- Parellel flow separation (bottom)