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Modesti, D. (author)We carry out a priori tests of linear and nonlinear eddy viscosity models using direct numerical simulation (DNS) data of square duct flow up to friction Reynolds number Re <sub>τ</sub>= 1055. We focus on the ability of eddy viscosity models to reproduce the anisotropic Reynolds stress tensor components a<sub>ij</sub> responsible for...journal article 2020