Wavelet-Adapted Sub-grid Scale Models for LES

The paper presents two novel turbulent models for LES based on a wavelet decomposition. This approach, denoted WALES, is simple and easy to implement. Tests on a number of flows using grids with different resolution near walls show that the models exhibit the same quality as the Smagorinsky model without the need of wall functions or near-wall damping. In the paper the basic wavelet framework and two such models are described in detail. Physical benefits of the models due to the use of wavelets are discussed. Results obtained with the models are compared to those using the Smagorinsky model, to experimental results and to results from Direct Numerical Simulations. The agreement achieved is generally good.