Investigation of the use of Prandtl/Navier-Stokes equation procedures for two-dimensional incompressible flows

The technique of combining solutions of the Prandtl equations with solutions of the Navier-Stokes equations to compute incompressible flow around two-dimensional bodies is investigated herein. Computational evidence is presented which shows that if the "obvious" coupling is used to combine the solutions, then the resulting solution is not accurate. An alternate coupling procedure is described which greatly improves the accuracy of the solutions obtained with the combined equation approach. An alternate coupling that can be used to create a more accurate vortex sheet/vortex blob method is then shown. © 1994 American Institute of Physics.