Navier Stokes equations Reynolds number Energy spectrum Alpha model Alpha models Approximation theory Current sheets Direct numerical simulation Energy spectra Filters (for fluids) Flow of fluids High Reynolds number Intermittency LES Lagrange multipliers Local area networks Lorentz force MHD Magnetohydrodynamics Mathematical models Navier Stokes Nonlocal Regularization models Rigid body Rigid structures Small scale Spectroscopy Subfilter scale Subfilter-scale physics Subgrid scale