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SUMMARYThis paper presents our e ort to addressing uid-structure interaction (FSI) problems by means of computational mechanics. A stabilized ÿnite element formulation is used to solve the incompressible Navier-Stokes equations written in primitive variables. The structure is modelled using rigid-body dynamic equations solved using a Runge-Kutta method. The distinctive feature of our approach is the combination of large eddy simulation (LES)-based on implicit turbulence modelling-with time-space adaptive techniques in arbitrary Lagrangian Eulerian co-ordinates (ALE). Three representative numerical examples are presented. The ÿrst one is the simulation of turbulent vortex shedding around a ÿxed obstacle, comparing our two-dimensional (2D) LES results with experiments and more reÿned threedimensional (3D) numerical solutions. The second example presents an ALE computation with moving boundaries, where we were able to detect the lock-in phenomenon for an oscillating cylinder driven by periodic vortex shedding. Our ÿnal example is the FSI problem associated to the ow around a dominant central span section of the Rio-Niterà oi bridge, where we compare our results with experiments performed in a wind tunnel.

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