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Shahzad, H. (author), Hickel, S. (author), Modesti, D. (author)We perform direct numerical simulations of turbulent flow at friction Reynolds number Re<sub>τ</sub>≈ 500 - 2000 grazing over perforates plates with moderate viscous-scaled orifice diameter d<sup>+</sup>≈ 40 - 160 and analyse the relation between permeability and added drag. Unlike previous studies of turbulent flows over permeable surfaces,...journal article 2022