On the Lagrangian and Eulerian time scales of turbulence within a two-dimensional array of obstacles

Di Bernardino A.;Monti P.;Leuzzi G.;Querzoli G.

2022-01-01

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Abstract

Fields of Lagrangian (TL) and Eulerian (TE) time scales of the turbulence within a regular array of two-dimensional obstacles of unit aspect ratio have been determined by means of a water-channel experiment reproducing the atmospheric boundary layer in neutral conditions. It has been found that there is a strong spatial inhomogeneity both of the scales and of their ratio, β= TL/ TE. The results can provide useful information on numerical modelling of tracer dispersion in urban areas.