Response of plates and compliant walls in turbulent channel flow

We simulate fluid-structure interaction of elastic plates and viscoelastic compliant walls in a turbulent channel using Direct Numerical Simulation (DNS). The impact of solid boundary conditions and material properties on the structural response is studied. The boundary conditions considered are - reflective, fixed, free, and simply supported. Intermittent large-amplitude fluctuations are present in the turbulent wall-pressure that are related to the near-wall burst-sweep events. The effect of these fluctuations on the plate response depends on the separation of the plate vibration and near-wall eddies time scales. As a result, the stiff plate vibration signal consists of similar intermittent events because of small time scale separation. However, the soft plate vibration signal consists of similar events only near the fixed or simply supported boundaries due to large time scale separation, and away from the plate boundaries, the plate vibration signal resembles an amplitude-modulated wave.