This book contains papers presented at the Third International Conference on Fluid Structure Interaction and the Eighth International Conference on Computational Modelling and Experimental Measurements of Free and Moving Boundary Problems. The first section is concerned with the interaction of fluids with a variety of structures encountered by the flow such as wind, current, biofluids, ocean waves, tall buildings, ocean structures, cables, towers, bridges, risers and biological structures. The second part deals with particular problems where the position of the border or interphase boundaries has to be determined as part of the solution.