Solenoidal spectral formulations for the computation of secondary flows in cylindrical and annular geometries - Solenoidal spectral formulationsA. Meseguer, M. Avila, F. Mellibovsky and F. MarquesEur. Phys. J. Special Topics, 146 (2007) 249-259DOI: https://doi.org/10.1140/epjst/e2007-00184-9