New Wall Laws for the Unsteady Incompressible Navier-Stokes Equations on Rough Domains Gabriel R. Barrenechea, Patrick Le Tallec and Frédéric Valentin ESAIM: M2AN, 36 2 (2002) 177-203 Published online: 15 May 2002 DOI: 10.1051/m2an:2002009