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Efficient quadrature for a boundary element method to compute three-dimensional Stokes flow
Authors:Werner Varnhorn
Abstract:A collocation-type boundary element method based on bilinear B-splines is used for the numerical solution of the Stokes Dirichlet problem in bounded domains D ? R3. The computation of the influence matrix requires the numerical evaluation of weakly singular integrals on the domain boundary if the usual double-layer potential ansatz is chosen. Here mostly standard methods with disjoint grids for collocation and integration are used. We develop a special integration scheme based on triangular co-ordinates near the singularity and show its efficiency compared with the method mentioned above.
Keywords:Stokes equations  Boundary elements  Quadrature  Triangular co-ordinates
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