Karman-Trefftz airfoil is an intriguing airfoil for which a complete set of exact

solutions can be computed. This solution has been used by many people to

verify the accuracy of their inviscid code (incompressible limit). If you have not,

use this code now to generate a (quadrilateral or triangular) grid, run your

code on it, compute the error, and verify the accuracy of your code. Me? I have

used it for my third-order multigrid Cauchy-Riemann solver