The Unsteady Fluid Dynamics Group (UFDG) is focused on the fundamental understanding of unsteady flow phenomena and its interactions with boundaries.  The group works on fundamental and applied problems to develop a deeper understanding of these unsteady fluid phenomena along with the interactions with both free and fixed boundaries.   Flows understudy in the group range from supersonic flow over open recesses to low Reynolds number flows associated with flapping Micro Air Vehicles.  The groups' studies are primarily experimental for which we use advanced optical measurement techniques along with free field and surface pressure measurement techniques.  One of the key aspects of UFDG’s data analysis involves the development of reduced order models and descriptions of the flow and its interactions with boundaries.