We present our methodology concerning wall-bounded flow modelling: A unifying strategy for wall-modelled and wall-modelled Large-Eddy Simulation (LES) approaches in the framework of compressible flows. The proposed method allows imposing the proper wall shear stress and heat flux, preserving both the no-slip and the isothermal/adiabatic conditions for the velocity and temperature fields. Minimally algorithmically intrusive, the technique automatically switches between wall-resolved and wall-modelled LES according to the local near-wall resolution. The results highlight the ability of the present method to accurately reproduce the outer layer turbulent dynamics of turbulent channels and boundary layer flows. In particular, velocity statistics and Reynolds stress components agree with reference Direct Numerical Simulations (DNS) and wall-resolved LES, confirming that the present methodology can be effectively employed to simulate wall-bounded flows at high Reynolds numbers.

A straightforward strategy to unify WR/WMLES approaches for compressible wall-bounded flows

De Vanna F.;Cogo M.;Picano F.;Benini E.
2022

Abstract

We present our methodology concerning wall-bounded flow modelling: A unifying strategy for wall-modelled and wall-modelled Large-Eddy Simulation (LES) approaches in the framework of compressible flows. The proposed method allows imposing the proper wall shear stress and heat flux, preserving both the no-slip and the isothermal/adiabatic conditions for the velocity and temperature fields. Minimally algorithmically intrusive, the technique automatically switches between wall-resolved and wall-modelled LES according to the local near-wall resolution. The results highlight the ability of the present method to accurately reproduce the outer layer turbulent dynamics of turbulent channels and boundary layer flows. In particular, velocity statistics and Reynolds stress components agree with reference Direct Numerical Simulations (DNS) and wall-resolved LES, confirming that the present methodology can be effectively employed to simulate wall-bounded flows at high Reynolds numbers.
2022
AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022
978-1-62410-631-6
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3412743
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