Eric Blayo and Véronique Martin Building generalized open boundary conditions for fluid dynamics problems International Journal for Numerical Methods in Fluids 71
This paper deals with the design of an efficient open boundary condition (OBC) for fluid dynamics problems. Such problems arise, for instance, when one solves a local model on a fine grid that is nested in a coarser one of greater extent. We propose OBCs on the basis of absorbing boundary conditions or Richardson extrapolation. Numerical test cases on a 1D Laplace equation and on a 1D shallow water system illustrate the improved efficiency of such a generalized OBC compared with usual ones.
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