Galerkin Coarse Grid Approximation for the Incompressible
                Navier-Stokes Equations in General Coordinates

                           S. Zeng and P. Wesseling
             Department of Technical Mathematics and Informatics
                        Delft University of Technology
                                  Mekelweg 4
                                2628 CD Delft
                               The Netherlands

                                   Abstract

In this paper, a part of multigrid methods, namely Galerkin coarse grid
approximation is discussed for the incompressible Navier-Stokes equations in
general coordinates, for two-dimensional problems.  Some possible
prolongations and restrictions are given, with modifications for both
Dirichlet boundary conditions and Neumann boundary conditions.  An algorithm
for computing the Galerkin coarse grid approximation is given.