Abstract: In this work, we will present a method to solve the incompressible Navier-Stokes equations using graphics hardware to simulate the fluid behavior. The method is fast enough to allow interaction with the fluid even on large domains. Using a new approach in the treatment of the boundary we get good results in simulations over complex domains. The fluid simulation is based on the method described in ,and to solve the problem with numerical dissipation we present a new scheme in GPU for vorticity confinement. The implementation is made with Cg.