Statistics in a Backscatter Eddy Viscosity Turbulence Model

This article addresses two significant drawbacks of an eddy viscosity turbulence model: the issue of excessive dissipation relative to energy input and the lack of a universal parameter specification. Considering the Baldwin–Lomax model with backscatter effects, we first prove the existence and uniqueness of global weak solutions under mild conditions. Our next result shows that this model maintains energy dissipation rates consistent with energy input, thereby avoiding over‐dissipation and aligning with phenomenology. Additionally, we propose a range for the model's mixing length.