Numerical Investigation of Wall Pressure Fluctuations of SUBOFF Based on Wall-Modeled Large-Eddy Simulation
In this paper,the numerical investigation of the flow around the SUBOFF at a Reynolds number of ReL=1.2x107 is conducted using the non-equilibrium wall model in wall-modeled large-eddy simulation via OpenFOAM.The Liutex vortex identification method is employed to analyze the vortex structure distribution near the hull surface.The time-averaged pressure coefficients on the hull surface are compared with experimental data.Subsequently,the prediction of wall pressure fluctuation is focused research by the wall model.And the wall pressure fluctuation frequency spectra on different areas of the hull and the wavenumber frequency spectra in different directions are provided.The results show that the wall-modeled large-eddy simulation can accurately predict the time-averaged pressure distribution on the hull surface.In terms of the wall pressure fluctuation spectra,the bow region of the hull exhibits higher fluctuating pressure levels compared to the fully developed turbulent region,indicating more intense pressure fluctuations.Additionally,the streamwise wavenumber frequency spectra of wall pressure fluctuation showcases the convective ridges of turbulent energy,effectively reflecting the spatial and temporal correlations of turbulence.
Wall-modeled large-eddy simulationWall stress modelWall pressure fluctuationSUBOFFWavenumber frequency spectrum
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