1Department of Aerospace Engineering Sciences and Joint Institute for Laboratory Astrophysics University of Colorado, Boulder, Colorado
2Department of Aerospace Engineering Sciences, University of Colorado, Boulder, Colorado
Tóm tắt
Energy spectra of the longitudinal and lateral turbulent velocities are measured behind grids of different geometries; the isotropic relation is not satisfied. Energy-dissipating eddies are more nearly isotropic than energy-containing eddies. Spectra of the energy-containing eddies and their deviation from isotropy depend on the grid geometry. Various microscales are measured to determine the anisotropy of the energy-dissipating eddies. The error committed in using the isotropic relation for energy decay is determined from the measurements.
