Ergodicity of 2D Navier-Stokes equations with random forcing and large viscosity

The stochastically forced, two-dimensional, incompressable Navier-Stokes equations are shown to possess an unique invariant measure if the viscosity is taken large enough. This result follows from a stronger result showing that at high viscosity there is a unique stationary solution which attracts solutions started from arbitrary initial conditions. That is to say, the system has a trivial random attractor. Along the way, results controling the expectation and averaging time of the energy and enstrophy are given.