This book presents and analyses vortex methods as a tool for the direct numerical simulation of incompressible viscous flows.The goal of this book is to present and analyze vortex methods as a tool for the direct numerical simulation of incompressible viscous flows. Vortex methods have matured in recent years, offering an interesting alternative to finite difference and spectral methods for high resolution numerical solutions of the Navier Stokes equations. In the last three decades research into the numerical analysis aspects of vortex methods has provided a solid mathematical background for understanding the accuracy and stability of the method. This book may serve as both a reference monograph and a textbook for computational fluid dynamics courses.The goal of this book is to present and analyze vortex methods as a tool for the direct numerical simulation of incompressible viscous flows. Vortex methods have matured in recent years, offering an interesting alternative to finite difference and spectral methods for high resolution numerical solutions of the Navier Stokes equations. In the last three decades research into the numerical analysis aspects of vortex methods has provided a solid mathematical background for understanding the accuracy and stability of the method. This book may serve as both a reference monograph and a textbook for computational fluid dynamics courses.Vortex methods have matured in recent years, offering an interesting alternative to finite difference and spectral methods for high resolution numerical solutions of the Navier Stokes equations. In the past three decades, research into the numerical analysis aspects of vortex methods has provided a solid mathematical background for understanding the accuracy and stability of the method. At the same time vortex methods retain their appealing physical character, which was the motivation for their introduction. This book presents and analyzes vortex methods as a tool for the direct numerical simls$