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Eric Blayo and Véronique Martin Building generalized open boundary conditions for fluid dynamics problems International Journal for Numerical Methods in Fluids 71

Article first published online: 17 APR 2012 | DOI: 10.1002/fld.3675

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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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