Hierarchical Adaptive Eddy-Capturing Approach for Modeling and Simulation of Turbulent Flows

• Main Authors: Giuliano De Stefano, Oleg V. Vasilyev
• Format: Article
• Language: English
• Published: MDPI AG 2021-02-01
• Series: Fluids
• Subjects: adaptive numerical methods; coherent vortex simulation; direct numerical simulation; large-eddy simulation; wavelet collocation method; wavelet threshold filtering
• Online Access: https://www.mdpi.com/2311-5521/6/2/83

A short review of wavelet-based adaptive methods for modeling and simulation of incompressible turbulent flows is presented. Wavelet-based computational modeling approaches of different fidelities are recast into an integrated hierarchical adaptive eddy-<i>capturing</i> turbulence modeling framework. The wavelet threshold filtering procedure and the associated wavelet-filtered Navier–Stokes equations are briefly discussed, along with the adaptive wavelet collocation method that is used for numerical computations. Depending on the level of wavelet thresholding, the simulation is possibly supplemented with a localized closure model. The latest advancements in spatiotemporally varying wavelet thresholding procedures along with the adaptive-anisotropic wavelet-collocation method make the development of a fully adaptive approach feasible with potential applications for complex turbulent flows.