'American Institute of Aeronautics and Astronautics (AIAA)'
Abstract
The modeling capabilities of the Lagrangian Averaged Navier-Stokes-α equations (LANS-α) is investigated in statistically stationary three-dimensional
homogeneous and isotropic turbulence. The predictive abilities of the LANS-α equations are analyzed
by comparison with DNS data. Two different forcing
techniques were implemented to model the energetics of the energy containing scales. The resolved flow
is examined by comparison of the energy spectra of
the LANS-α and the DNS computations; furthermore, the correlation between the vorticity and the
eigenvectors of the rate of the resolved strain tensor
is studied. We find that the LANS-α equations captures the gross features of the flow while the wave
activity below a given scale α is filtered by the non-
linear dispersion