"A great challenge in both fundamental and applied fluid mechanics research is to reduce friction drag on bodies immersed in a fluid. Even small amounts of drag reduction on airplanes, ships, cars, wind- and water-power plants could save several billions Euros annually and help preserve earth’s resources. The present project combines recent developments in numerical simulations of fluid flows, novel theory of poroelasticity and inspiration from biological observations, to devise passive flow control techniques. The control strategies are based on coating the surface (such as the wing of an airplane) with either rigid and permeable roughness elements or with a soft, porous and elastic composite to achieve drag reduction. The properties and initial parameters of the coated surfaces are chosen based on biological observations of how animals use scales and pelage to reduce drag. The proposed project will, in addition to significantly broaden the fellow's research experience, incorporate efficient and targeted complementary training to produce an independent scholar who will perform high quality multi-disciplinary research in fluid mechanics. For example, the fellow will organize and deliver one advanced-level course, co-advise a graduate student on a daily basis, initiate new international collaborations as well as attend complementary training courses available at the host organization."