CLUSTERING OF GALAXIES BY THE ALPHA-EFFECT

The development of large-scale flows from the stresses generated by sm all-scale flows in a Navier-Stokes system is studied in order to model the large-scale structure of the Universe. This process is an analogu e of the alpha-effect, by which a large-scale magnetic field can be ge nerated beginning with small-scale fields. It is shown that, under sim ilar conditions of anisotropy and non-zero mean helicity, large-scale flows can be generated. The clustering of galaxies on all possible sca les is then suggested to be a result of the hydrodynamic hierarchy.