Adaptive Euler simulations of airfoil-vortex interaction

A grid redistribution method is used together with an improved spatially third-order accurate Euler solver to improve the accuracy of direct Enter simulations of airfoil-vortex interaction. The presented numerical results of two airfoil-vortex interaction cases indicate that with combination of the two methods, the numerical diffusion of vorticity inherent in the direct Euler simulations is drastically reduced without increasing the number of grid points. With some extra works due to grid redistribution, the predicted vortex structure is well preserved after a long convection and much sharper acoustic wave front resulting from airfoil-vortex interaction is captured. Copyright (c) 2006 John Wiley & Sons, Ltd.