- Navier-Stokes with slip is a computable mathematical model which describes slightly viscous flow and thus opens to computational exploration of aerodynamics. This is to be compared with the state-of-the-art dictate by Prandtl to use no-slip, which has made Navier-Stokes uncomputable by requiring resolution of thin boundary and thus has blocked progress for a century. This is acknowledged by one of the reviewers.
- Navier-Stokes/slip predicts drag and lift of a wing over the full range of angles of attack within the tolerance of experimental observation. This is new and offers a new tool to the design of airplanes, boats and wind turbines.
- The state-of-the-art lift theory by Kutta-Zhukovsky relies on a "trick" which is mathematically incorrect (demanding a no-slip condition of inviscid flow) and physically incorrect (2d flow).
- The state-of-the-art theory of drag by Prandtl attributing drag to boundary layer effects is incorrect, since Navier-Stokes/slip gives correct drag without boundary layers.
- The true 3d separation mechanism at the trailing edge resulting from a basic instability of potential flow.
- Unification of mathematical theory and observed aerodynamics, in contrast to the split which has troubled fluid mechanics since its start with d'Alembert's paradox.
- Leading frontier computational technique of duality based adaptive stabilized finite element methodology implemented in well document open source software (Unicorn/FEniCS).
- True physical explanation of the generation of large lift/small drag of a wing, which can be presented to a general audience in understandable form.
- Concrete possibility reform of aerodynamics education with new text books combining mathematics, computation and physics into a new synthesis.
- Finally, the article is a product of a world leading group in computational fluid dynamics.
lördag 18 augusti 2012
10 Good Reasons for AIAA to Publish New Theory of Flight
Our article New Theory of Flight has been rejected by AIAA Journal on the basis of two referee reports discussed in previous posts. Let me here collect some reasons for AIAA to change its decision. The article shows: