Improvements in incompressible turbulent horseshoe vortex juncture flow calculations

Improvements to a central-difference, finite-volume, explicit Runge-Kutta time-stepping scheme for the steady-state solution of the three-dimensional incompressible, Reynolds-averaged Navier-Stokes equations are presented. Comparisons with the experimental measurements in the turbulent horseshoe vortex flow about an airfoil/flat-plate juncture indicate that both the accuracy and efficiency of the numerical scheme have been improved. In particular, the improved scheme is robust for the problem of high aspect ratio computational cells arising from high Reynolds number flows. A multigrid technique has been implemented to improve the rate of convergence and grid sensitivity has been investigated.