@article{oai:nagoya.repo.nii.ac.jp:02002164,
 author = {Zheng, Y. and Nagata, K. and Watanabe, T.},
 issue = {11},
 journal = {Physics of Fluids},
 month = {Nov},
 note = {Turbulent characteristics in the far field of active-grid turbulence have been investigated through wind tunnel experiments using hot-wire anemometry. Two forcing protocols are employed following previous studies: one is the double-random mode and the other is the open mode with the grid remaining static with minimum blockage. The integral length scale L for the double-random modes slightly decreases with streamwise distance in the far field as observed in the near field of the active-grid turbulence. The nondimensional dissipation rate 𝐶𝜀 for the double-random modes is around 0.5. This asymptotic value is different from those reported in previous active-grid turbulence experiments and could be nonuniversal. The equilibrium scaling 𝐿/𝜆=𝐶𝜀𝑅𝑒𝜆/15 (λ is the Taylor microscale and 𝑅𝑒𝜆 is the turbulent Reynolds number) with a constant 𝐶𝜀 is established in the far field of the double-random modes regardless of active-grid motions. The sum of production and destruction terms in the enstrophy budget equation for homogeneous and isotropic turbulence 𝑆+2𝐺/𝑅𝑒𝜆 (S is the skewness of the longitudinal velocity derivative and G is the destruction coefficient) is proportional to 𝑅𝑒𝜆^-1 and close to zero in the present active-grid turbulence, suggesting that the equilibrium scaling is possibly related to the balance between the production and destruction of the enstrophy.},
 title = {Turbulent characteristics and energy transfer in the far field of active-grid turbulence},
 volume = {33},
 year = {2021}
}