We propose a method of solving the Navier-Stokes equations in incompressibl
e flow It is based on the projection of the velocity field, approached by a
prediction step on a zero divergence field. The novelty of this method con
cerns how the projection is made, directly operating on all the components
of the velocity field through a coupling. A highly implicit algorithm allow
s Its to maintain all physical boundary conditions of the problem during th
e solution steps. (C) 1999 Academie des sciences/Editions scientifiques et
medicales Elsevier SAS.