The Coupling of Natural BEM and FEM for Stokes Problem on Unbounded Domain
无界区域上Stokes问题的自然边界元与有限元耦合法

In this paper, the coupling of the Natural boundary element method and the finite ele-ment method for Stokes problem on an unbounded domain is considered. In order to overcomethe difficulty caused by infinity of the domain, the Natural boundary reduction is applied toreduce the problem into an equivalent boundary value problem on a bounded domain. This newproblem is solved numerically by coupling the boundary element method with the mixed finite ele-ment method. Because of the compatibility of Natural reduction with the original variationalformulation, this coupling is natural and direct. It is just a distinctive advantage of the methodpresented.