Y. Achdou et O. Pironneau, DOMAIN DECOMPOSITION AND WALL LAWS, Comptes rendus de l'Academie des sciences. Serie 1, Mathematique, 320(5), 1995, pp. 541-547
Wall Laws are used extensively in Computational Fluid Mechanics to eli
minate from the domains of computation regions of strong gradients or
regions where the geometry is complex. We give here an error estimate
for these approximations on the Dirichlet problem with complex boundar
ies.