Wavelet-based adaptive unsteady Reynolds-averaged turbulence modelling of external flows. (5th January 2018)

• Record Type: Journal Article
• Authors: De Stefano, Giuliano; Vasilyev, Oleg V.; Brown-Dymkoski, Eric
• Is Part Of: Journal of fluid mechanics. Volume 837(2018)
• Page Start: 765
• Page End: 787
• Publication Date: 2018-01-05
• Subjects: computational methods, -- turbulence modelling, -- turbulence simulation; Fluid mechanics -- Periodicals; 532.005
• DOI: 10.1017/jfm.2017.798
• Languages: English
• ISSNs: 0022-1120

Abstract

Abstract : The recent development of the adaptive-anisotropic wavelet-collocation method, which incorporates the use of coordinate transforms, opens new horizons for wavelet-based simulations of wall-bounded turbulent flows. The new wavelet-based adaptive unsteady Reynolds-averaged Navier–Stokes approach for computational modelling of turbulent flows is presented. The proposed methodology that is integrated with anisotropic wavelet-based mesh refinement is demonstrated for a two-equation eddy-viscosity turbulence model. The performance of the method is assessed by conducting numerical simulations of the turbulent flow past a circular cylinder at subcritical Reynolds number. The present study demonstrates both the feasibility and the effectiveness of the new wavelet-based adaptive unsteady Reynolds-averaged turbulence modelling procedure for external flows.