Open Boundary Conditions and Nesting Techniques

  • Lars Petter RøedEmail author
Part of the Springer Textbooks in Earth Sciences, Geography and Environment book series (STEGE)


The aim of this chapter is to discuss open boundaries and some of the techniques used to deal with them. An open boundary is defined as a computational boundary at which disturbances originating in the interior of the computational domain are allowed to leave without disturbing or deteriorating the interior solution (Røed and Cooper, Advanced physical oceanographic numerical modelling. D. Reidel Publishing Co, Dordrecht, 1986). Even though the governing equations are still valid at these boundaries, they nonetheless constitute a boundary in a numerical sense. Hence, we focus on how to construct conditions, or open boundary conditions (OBCs), in such a way that disturbances originating in the interior of the computational domain are indeed allowed to leave without disturbing or deteriorating the interior solution.


Open Boundary Conditions Nesting Technique Flow Relaxation Scheme (FRS) Sponge Condition Exterior Solution 
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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of GeosciencesUniversity of OsloOsloNorway
  2. 2.Norwegian Meteorological InstituteOsloNorway

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