Comparison of advanced turbulence modeling approaches for fluid-structure interaction

Abstract

In this study we present the results of the benchmark of a turbulent FluidStructure Interaction test case. An implicit partitioned approach is employed to couple the fluid and structure subproblems. We employ three different techniques to model the turbulence in fluid motion. A 2-d unsteady Reynolds Averaged Navier-Stokes approach, with an elliptic relaxation based turbulence model (ζ −f), successfully captures the oscillation mode. Further investigations are performed with a Delayed Detached Eddy Simulation and a Large Eddy Simulation model. The ζ −f model is used as a baseline unsteady Reynolds Averaged Navier-Stokes model for the Delayed Detached Eddy Simulation. A comparison of the structural deflections from the simulations show a reasonable agreement with the experiment. In light of the presented results, the suitability of the modeling approaches is discussed.