Turbulence modelling for strongly detached high-Reynolds number flows around bodies with applications in fluid-structure interaction

Abstract

In the present talk, we will examine recent turbulence modelling approaches for the simulation of highly detached unsteady flows around bodies at high Reynolds number with emphasis to advanced statistical and hybrid methods. The structural properties of non-equilibrium turbulence in the near - region will be discussed, as well as their impact on the modification of the turbulence scales and their consequence in specific turbulence modelling developments. Emphasis will be given in the prediction of the aerodynamic global parameters, their predominant frequencies and the pressure fluctuations responsible for acoustic noise, as well as of thin shear-layer prediction past the separation points. These modelling developments will include aspects of inverse cascade and of upscale modelling. Applications will be provided for flows around fixed bluff bodies, including also fluid-structure interaction phenomena arising from MIV (Movement Induced Vibration).