This talk, held at the 6th HLRS Workshop in Stuttgart in october 2003,
presents a portable research code for the simulation of 3-D incompressible
nonstationary flows - the first parallel version of FEATFLOW - and some
current and recent applications of the code. Run times and scaling on
(among others) Hitachi SR8000, Cray T3E-1200 and HeLiCS are dealt with and
the (numerical) consequences for parallel efficiencies arising from the
use of block smoothers in parallel multigrid methods are covered.