"The development of new energy harvesting technologies from renewable sources is essential for the European Union not only to prove its leadership in reducing greenhouse gas emissions, but also to achieve a greater energetic independence from limited fossil fuels. To assess the performance and identify the potential of particular technological designs to harvest energy from geophysical flows, a fundamental understanding of the underlying fluid-solid interactions instabilities and non-linear dynamics is essential. The proposed research project will adopt a fundamental point of view to investigate three aspects of flow energy harvesting using coupled fluid-solid instabilities: (i) the impact of the harvesting system on the fluid-solid dynamics, (ii) the coupling between multiple harvesting units through the flow and the coupled dynamics of lattices of vibrating solids, (iii) and the similarities with the active flapping problem as encountered in collective biological locomotion (e.g. fish schooling). Vibrating cylinders in cross flow and flexible plates in axial flows will be considered. This research work will be performed during Dr. Michelin's re-integration period at LadHyX at Ecole polytechnique after his research experience in the United States from 2005 to 2010. It will benefit from the scientific excellence of this institution and the expertise in these disciplines gained by Dr. Michelin during the beginning of his career. This project will ensure the long-term establishment of Dr. Michelin's research activities in Europe and the development of a leading research at Ecole polytechnique on flow energy harvesting."