Wavelet-based adaptive implicit large-eddy simulation of turbulent channel flow
Giuliano De Stefano · Computers & Fluids · 2024
The wavelet-based adaptive implicit large-eddy simulation approach to computational modeling of turbulent flows is introduced. The direct solution of the wavelet-filtered compressible Navier–Stokes equations is attained without employing any explicit modeling procedure for the unclosed terms. Instead, the dissipative properties of the numerical method using adaptive wavelet collocation are exploited for implicit subgrid-scale modeling. The performance of the newly proposed method was preliminarily assessed by carrying out adaptive simulations of fully developed turbulent supersonic channel flow, which represents a well-established benchmark for wall-bounded attached compressible turbulent flows. The comparison against higher-fidelity solutions proved both the feasibility and the effectiveness of the implicit modeling approach for wavelet-based large-eddy simulation. The consistency of the wavelet-based approach with turbulence physics guaranteeing the correct amount of implicit dissipation was demonstrated.