Speaker: Prof. Karl Kunisch Title: Optimal Control of Systems Governed by the Navier Stokes Equations Abstract: Optimal control, both open and closed loop, of systems describing flow phenomena still present diverse challenges due, in part, to their size, their nonlinearity and different flow regimes. These difficulties, in turn, have acted as a catalyst for the enhancement of control techniques for large systems of partial differential equations. - In this talk I shall present receding horizon techniques as well as model - reduction methods, based on proper orthogonal decomposition (POD) and approximate inertial manifolds concepts, and their impact on control of fluids.- For the numerial treatment of inequality constraints control or state variables semi-smooth Newton techniques will briefly be described.