A simplified method based on a thin screen assumption and a collocation met
hod is proposed to determine the Stokes pow near a pore of a spatially peri
odic model porous wall with suction. The problem is split into two simple p
roblems: a simple shear flow, and a uniform pow through art elementary circ
ular constriction of a spatially periodic thin screen. The results are very
close to those obtained numerically for the problem without using this sim
plification. (C) Academie des sciences/Elsevier; Paris.