A comparison between two Large Eddy Simulation (LES) approaches is proposed to reproduce the flow around a tandem cylinder arrangement in highly turbulent conditions (Reynolds number of 166,000) at a supercritical distance (L/D = 3.7 with L the distance between the cylinder centers and D their diameter). A LES - Variational Multi-Scale (VMS) and a classic LES methods are employed to model turbulence on the same unstructured grid. The results of the computations are compared to a set of experimental database built by NASA which includes averaged and fluctuating velocities, steady and unsteady pressure sensors. The top-end purpose of the study is to further demonstrate the suitability of the LES-VMS approach for turbulent flows around slender bodies with high aspect ratio.

Volume Subject Area:
CFD and VIV
Topics:
Cylinders, Simulation, Turbulence, Computation, Databases, Flow (Dynamics), Large eddy simulation, NASA, Pressure sensors, Reynolds number
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